ip178a ETC-unknow, ip178a Datasheet

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ip178a

Manufacturer Part Number
ip178a
Description
8-port 10/100 Ethernet Integrated Switch
Manufacturer
ETC-unknow
Datasheet

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Feature
Preliminary, Specification subject to change without notice
IP178A-DS-P05
Sep. 09, 2002
Three-in-one 8 port 10/100 Ethernet switch
- Built in an 8 port Ethernet switch engine
- Built in 8 10/100M transceivers
- Built in SSRAM
Support flow control
- Support IEEE802.3x for full duplex mode operation
- Support backpressure for half duplex mode
Built in up to 1K MAC address
An 8 port switching fabric
- Support two-level hashing algorithm to improve
- Support address aging
- Store and forward mode
- Broadcast storm protection
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DSP approach transceivers
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LED status of Link, Receive, Full duplex, and Speed
LED with power on diagnostic function
Set operation parameters via pins or EEPROM
Full line speed capability of 148800 (14880)
Support 1536 byte data transfer for VLAN traffic
Support one MII port
Support port base VLAN
Support CoS
Auto negotiation
Fully digital adaptive equalizer and timing recovery
Base line Wander correction
10BaseT, 100BaseT, and 100BaseFX(port6, port7
Automatic MDI/MDI-X configuration
operation
address collision
packets/sec for 100M (10M)
module
only) operation
8-Port 10/100 Ethernet Integrated Switch
1
General Description
IP178A is an 8 port 10/100 Ethernet integrated switch. It
consists of an 8-port switch controller and eight Fast
Ethernet transceivers. Each of the transceivers complies
with the IEEE802.3, IEEE802.3u, and IEEE802.3x
specifications. The transceivers in IP178A are designed
in DSP approach with advance 0.25um technology; this
results in high noise immunity and robust performance.
Two ports of IP178A can be configured as 100BaseFX.
The IP178A operates in store and forward mode. It
stores the incoming packet to the internal SSRAM and
learns the SA (source address) automatically if the
packet is error free. The SA is stored to the internal
address table. IP178A forwards a packet according to DA
and address table. When the segments of destination
ports are free, it reads the packet from the internal
SSRAM and forwards it to the appropriate ports
according to the address table. The incoming packets
with errors are dropped. IP178A supports IEEE802.3x,
optional backpressure, Auto MDI/MDI-X, CoS, port base
VLAN, one MII port and various LED functions, etc.
These functions can be configured to fit the different
requirements by feeding operation parameters via
EEPROM interface or pull up/down resistors on specified
pins.
interface
Utilize single clock source (25Mhz)
Utilize single power supply (2.5v)
0.25um technology
Packaged in 208 pin PQFP
(Advance Version
IP178A

Related parts for ip178a

ip178a Summary of contents

Page 1

... Utilize single power supply (2.5v) 0.25um technology Packaged in 208 pin PQFP General Description IP178A port 10/100 Ethernet integrated switch. It consists of an 8-port switch controller and eight Fast Ethernet transceivers. Each of the transceivers complies with the IEEE802.3, IEEE802.3u, and IEEE802.3x specifications. The transceivers in IP178A are designed in DSP approach with advance 0.25um technology ...

Page 2

... The major differences in application circuit between IP178 and IP178A No more external bias and series resistors RXIP 95.3 R RXIM 95.3 R IP178 0.1u GND GND No more A/D bypass capacitors & add a pull up resistor to turn on auto MDI_MDIX VRTP VRBM pin134=NC VRTM VRBP IP178 Transmit circuit is the same as receive circuit for MDI-MDIX function. ...

Page 3

... TxMAC Tx Buffer Mgnt Queue Mgnt (x8) EEPROM Interface EEPROM OSC IP178A 4 4 Xfm Xfm MII RISC OSC IP178A 4 3 Xfm Xfm 3 (Advance Version) IP178A Address Table Hashing Unit Memory I/F SSRAM Unit Empty Buffer Mgnt LED Controller MII UP OSC IP178A 4 3 Xfm Xfm ...

Page 4

... RXIM5 47 RXIP5 RXVCC5 51 FXSD6 52 Preliminary, Specification subject to change without notice IP178A-DS-P05 Sep. 09, 2002 IP178A 4 (Advance Version) IP178A 156 P6_7_HIGH (LINK_LED0) 155 COS_EN (LINK_LED1) 154 MII_P0_FULL 153 MII_P0_SPEED VCC_SRAM 152 151 OP0[1] (LINK_LED2) 150 OP0[0] (LINK_LED3) 149 FORCE_MODE 148 ...

Page 5

... It is connected to GND through a 6.19k (1%) resistor in application circuit. 100Base-FX signal detect Fiber signal detect of port 6 and 7 when the ports are configured to be fiber ports. Fiber signal detect is active if the voltage of FXSD is higher than 1.2v mode is selected, the pins must be connected to ground. TP receive TP transmit 5 (Advance Version) Description IP178A ...

Page 6

... A 25Mhz clock from oscillator is fed to this pin. The X2 pin should be left open in this application. Crystal pin A 25Mhz crystal can be connected to OSCI and X2. Reset It is low active. It must be hold for more than 1ms Schmitt trigger input. 6 (Advance Version) Description IP178A ...

Page 7

... On: 100M link ok On: full duplex Flash: Tx/Rx Off: 10M Off: half duplex On: 100M On: full duplex Flash: collision Off: link fail Off: half duplex On: 100M link ok On: full duplex Flash: Tx/Rx Flash: collision Off: 10M Off: half duplex On: 100M On: full duplex Flash: collision IP178A ...

Page 8

... IP178A provides 24 LED pins to drives 24 LED directly. The 24 LED are LINK_LED[7:0], SPEED_LED[7:0], and FDX_LED[7:0]. 0: LED scan mode (default) IP178A provides 12 LED pins to drives 32 LED in scan mode. The 32 LED are Link LED[7:0], Speed LED[7:0], Full duplex LED[7:0], and Rx LED[7:0 compatible to the previous version of IP178. ...

Page 9

... Off: link fail On: full duplex On: 100M link ok Flash: Tx/ Rx Off: half duplex Off: 10M On: full duplex On: 100M Flash: collision Off: half duplex Off: link fail On: full duplex On: 100M link ok Flash: collision Flash: Tx/Rx Off: half duplex Off: 10M On: full duplex On: 100M Flash: collision IP178A ...

Page 10

... MRXD0 is RXD in SNI mode. MCOL output signal MCOL if external MII port is enabled (MII_P0_EXT_EN=1). This pin is shared with X_EN. Please reference pin description of X_EN for more detail information MTXEN MTXEN is TXEN in SNI mode. MTXD[3:0] MTXD0 is TXD in SNI mode. 10 (Advance Version) Description IP178A ...

Page 11

... Turn on twopartD (Twopart) 1: enable (fixed), 0: disable IP178A examine the carrier for 64 bits only during its back off period if this function is enabled. It makes IP178A have higher priority in a collision event. IP178A uses the default value. User can’t change the setting. ...

Page 12

... Aging time selection of address table IPL An address tag in hashing table will be removed if this function is turned on and its aging timer expires. AGETIME[1] AGETIME[ (Advance Version) Description st nd layer and 2 layer Aging time no aging 120s 240s (default) 480s IP178A ...

Page 13

... VLAN full duplex LED of port 3 after reset if LED direct mode is selected. 0: disabled (default), 1: enable IP178A are separated into 7 VLANs if this function is enabled. The VLAN group is as follows, VLAN 1: port0, port 7 VLAN 2: port 1, port 7 ...

Page 14

... FLP is sent out every 12~16ms. 0: enable FLP is sent out every 1.2 sec if cable is unplugged and the function is enabled FLP is received, IP178A resumes to send out FLP every 12~16ms. This function is disabled in spite of the setting on this pin and it can be enable by EEPROM only. IPH Far end fault detect function of Fiber port ...

Page 15

... Port7 FX full duplex, port1 nway with all capability 0 Port7 FX half duplex, port1 nway with all capability 0 Port0 nway with all capability (default) 0 Port6 FX full duplex, port0 nway with all capability 0 Port6 FX half duplex, port0 nway with all capability 15 (Advance Version) Description Description IP178A ...

Page 16

... Power of internal SRAM Power for LED and EEPROM Power for LED and EEPROM Power of analog receive block Power of analog receive block Power of analog transmit buffer Power of analog transmit buffer No connection. They should be left open for normal operation. 16 (Advance Version) IP178A Description ...

Page 17

... At the same time, IP178A examines the address field of the packet. By the way, switch learns the locations of every station (source address) and records them on the address table. IP178A then reads the packet from the internal memory and sends it to the appropriate ports according to the address table. Eventually, IP178A supports the switching function by dropping or forwarding the incoming packets ...

Page 18

... The remote station will defer transmission after detecting the jam signals. Carrier based backpressure is sent by IP178A, when the buffer of a port is full. IP178A sends jam packets continuously to defer the remote station. The length of jam packet is 1518 byte and the IPG is equal to 96-bit time ...

Page 19

... IEEE 802.3x The IEEE 802.3x is used for flow control in full duplex mode if both IP178A (X_en=1) and the remote station have IEEE802.3x capability. When the level of occupied buffer of a port is over set threshold, it will send a PAUSE frame with maximum delay FFFF. The remote station will stop to transmit the next packet after receiving the PAUSE frame ...

Page 20

... Broadcast Storm Protection IP178A is able to prevent receiving too many broadcast packets to waste the switch resource. IP178A discards the incoming broadcast packets depending on the setting of Bf_stm_en if the number of broadcast packets from a port exceeds threshold. 20 (Advance Version) Result Remote site My site My 802 ...

Page 21

... That is, IP178A can be connected to another devices with either crossover cable or non-crossover cable. When a cable is plugged, IP178A looks for NLP, FLP or MLT3 signals to make sure if the receive path is correct. If IP178A finds nothing in the receiving path, it crosses over the RX and TX pairs and examines the inputs again. ...

Page 22

... Sep. 09, 2002 RJ45 RJ45 RJ45 RJ45 IP178A works at MDI mode RJ45 RJ45 RJ45 RJ45 IP178A works at MDIX mode ...

Page 23

... TOS(type of service) VLAN tag IP packet The frame format of frame base Cos port6, port7 High Packets with high Priority priority tag Queue Packets with higher forwarding priority port 2 port 3 port 4 The frame base Cos operation 23 (Advance Version) port 5 port 5 IP178A ...

Page 24

... VLAN IP178A VLAN 1 VLAN 2 port 0 port 1 The VALN group in IP178A when VLAN_ON pin is pulled high port 0 port 1 port 2 port 3 port 4 port 5 port 6 port 7 The VALN group in IP178A when VLAN registers are enabled Preliminary, Specification subject to change without notice IP178A-DS-P05 Sep. 09, 2002 ...

Page 25

... MII IP178A supports one MII. When the interface is active (MII_P0_EXT_EN=1), the Phyceiver of port0 is disabled and the switch core interfaces the MII directly. This make IP178A can behave like a Fast Ethernet Phyceiver on port 0. Switch engine Port1 PHYceiver Port2 Port3 PHYceiver PHYceiver Preliminary, Specification ...

Page 26

... When IP178A works at scan mode, phase pins run periodically to generate state_1 to state_4. Link_a sends out the link status of port0 at state_1 and Link_b sends out the link status of port4 at state_1. IP178A supports rx, fdx and speed LED in the same way. The detail description and waveforms are shown in the following diagram ...

Page 27

... LINK_a Application circuit of link LED in direct mode LINK LED[0] LINK LED[1] LINK LED[2] LINK LED[3] LINK LED[4] LINK LED[5] LINK LED[6] LINK LED[7] Preliminary, Specification subject to change without notice IP178A-DS-P05 Sep. 09, 2002 LINK LED[7:4] VCC 27 (Advance Version) IP178A LINK LED[3:0] ...

Page 28

... Off link fail Flash rx/tx Preliminary, Specification subject to change without notice IP178A-DS-P05 Sep. 09, 2002 following table. The default value is the same as the IP178A previous version noted that Rx LED is supported in LED scan mode only. RX LED[7:0] FDX LED[7:0] Flash collision On Off idle ...

Page 29

... T = 2.75 sec (12) After T = 3.0 sec, LED becomes normal operation Operation parameters setting IP178A supports two ways to modify its initial values of operation parameters to fit different applications. It read the initial value via pins or EPROM interface. The detail description of each pins and each bit in the EEPROM is illustrated in the next paragraph ...

Page 30

... EEPROM. The data in EEPROM is valid only if there is a specific pattern 55AA found in the register 0. If there is no valid data in EEPROM, IP178A will keep the value read from resistors setting. After reading the EEPROM, the pins of EEPROM interface are input signals. ...

Page 31

... IP178A-DS-P05 Sep. 09, 2002 - EEPROM enable register This register should be filled with 55AA. IP178A will examine the specified pattern to confirm if there is a valid EEPROM. The initial setting is updated with the content of EEPROM only if the specified pattern 55AA is found. - ...

Page 32

... An address tag in hashing table will be removed if this function is turned on and its aging timer expires. ALLPASS ALLPASS IP178A forwards all packets for testing only. The default value must be adopted for normal operation. 1: turn on, 0: turn off MODBCK MODBCK, Turn on modified back off algorithm The maximum back off period is limited to 8-slot time if this function is turned on ...

Page 33

... Port6 FX full duplex, port0 mode0 0 Port6 FX half duplex, port0 are mode0 FEF_EN Fef_en, Far end fault enable 1: enable, 0: disable Savepw_a_en, Save power mode for auto-negotiation 1: enable, 0: disable The default value must be adopted for normal operation. MDI/MDI-X enable 1: enable, 0:disable 33 (Advance Version) IP178A Description Description ...

Page 34

... This function is for testing only. The default value must be adopted for normal operation. - Reserved - This function is for testing only. The default value must be adopted for normal operation. - This function is for testing only. The default value must be adopted for normal operation. 34 (Advance Version) IP178A Description ...

Page 35

... Bit3=1, port 3 and port0 are in the same VLAN; Bit4=1, port 4 and port0 are in the same VLAN; Bit5=1, port 5 and port0 are in the same VLAN; Bit6=1, port 6 and port0 are in the same VLAN; Bit7=1, port 7 and port0 are in the same VLAN; 35 (Advance Version) IP178A Description ...

Page 36

... Bit3=1, port 3 and port2 are in the same VLAN; Bit4=1, port 4 and port2 are in the same VLAN; Bit5=1, port 5 and port2 are in the same VLAN; Bit6=1, port 6 and port2 are in the same VLAN; Bit7=1, port 7 and port2 are in the same VLAN; 36 (Advance Version) IP178A Description ...

Page 37

... Bit2=1, port 2 and port4 are in the same VLAN; Bit3=1, port 3 and port4 are in the same VLAN; Bit4, don’t care; Bit5=1, port 5 and port4 are in the same VLAN; Bit6=1, port 6 and port4 are in the same VLAN; Bit7=1, port 7 and port4 are in the same VLAN; 37 (Advance Version) IP178A Description ...

Page 38

... Bit2=1, port 2 and port6 are in the same VLAN; Bit3=1, port 3 and port6 are in the same VLAN; Bit4=1, port 4 and port6 are in the same VLAN; Bit5=1, port 5 and port6 are in the same VLAN; Bit6, don’t care; Bit7=1, port 7 and port6 are in the same VLAN; 38 (Advance Version) IP178A Description ...

Page 39

... IP178A-DS-P05 Sep. 09, 2002 Corresponding pin 39 (Advance Version) Description Register content PROM ENABLE LED_O_SEL COS_EN P6_7_HIGH BP_KIND X_EN BK_EN BF_STM_EN MII_P0_FULL MII_P0_SPEED MII_P0_FLOW_CTL MII_P0_EXT_EN DROP16 HASH_MODE[1:0] AGETIME ALLPASS MODBCK OP1[1] OP1[0] OP0[1] OP0[0] FORCE_ MODE FEF_EN SAVEPW_A_EN MDI_MDIX_EN - - UPDATE_R4_EN - - - - - - - UTP_DET IP178A ...

Page 40

... Preliminary, Specification subject to change without notice IP178A-DS-P05 Sep. 09, 2002 Corresponding pin 40 (Advance Version) Description Register content PORT1 VALN TABLE PORT0 VALN TABLE PORT3 VALN TABLE PORT2 VALN TABLE PORT5 VALN TABLE PORT4 VALN TABLE PORT7 VALN TABLE PORT6 VALN TABLE IP178A ...

Page 41

... TCS Chip select delay TDI Data input delay TOD Output delay Preliminary, Specification subject to change without notice IP178A-DS-P05 Sep. 09, 2002 tCS tSK tDI Description Min 41 (Advance Version) tOD 0 D15 D14 D0 Typical Max Units 5. 2000 ns IP178A ...

Page 42

... Typ. 25 -50 Sym. Min. Typ. VIL VIH 2.0 VOL VOH 2.4 42 (Advance Version) Max. Unit Conditions All ports link at 10M/ full. W All ports link at 100M/ full. W Unlink situation Max. Unit Conditions MHz +50 PPM Max. Unit Conditions 0 0.4 V IOH=4mA, VCC=3.3V V IOL=4mA, VCC=3.3V IP178A ...

Page 43

... Duty Cycle Distortion Overshoot Order Information Part No. IP178A Preliminary, Specification subject to change without notice IP178A-DS-P05 Sep. 09, 2002 Sym. Min. Typ. Max. VP 0.95 1.0 1. 100 102 TRF TRFS 0 PIN 208 PIN PQFP 43 (Advance Version) IP178A Unit Conditions Notice - ...

Page 44

... Package Detail QFP 208L Outline Dimensions Preliminary, Specification subject to change without notice IP178A-DS-P05 Sep. 09, 2002 44 (Advance Version) IP178A Unit: Inches/mm ...

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