CS8900A-CQ3 Cirrus Logic Inc, CS8900A-CQ3 Datasheet - Page 58

• Manufacturer Part Number: CS8900A-CQ3
• Description: Ethernet ICs IC 10Mbps Ethernet Controller 3.3V
• Manufacturer: Cirrus Logic Inc

Specifications of CS8900A-CQ3

• Ethernet Connection Type: 10Base- 2, 10Base- 5, 10Base- F, 10Base- T
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Product: Ethernet Controllers
• Standard Supported: IEEE 802.3
• Data Rate: 10 Mbps
• Maximum Operating Temperature: + 70 C
• Package / Case: LQFP-100
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

001000
Loss-of-CRS
SQEerror
TxOK
Out-of-Window
Jabber
#-of-TX-collisions
16coll
Reset value is:
Notes:
4.4.11 Register 9: Transmit Command Status
(TxCMD, Read-only, Address: PacketPage base + 0108h)
This register contains the latest transmit command which tells the CS8900A how the next packet should be sent.
The command must be written to PacketPage base + 0144h in order to initiate a transmission. The host can read
the command from register 9 (PacketPage base + 0108h). See Section 5.6 on page 99.
001001
TxStart
58
7
F
TxStart
1.In any event register, like TxEvent, all bits are cleared upon readout. The host is responsible for
processing all event bits.
2.TxOK (Bit 8) and the Number-of-Tx-Collisions (Bits E-B) are used in normal packet transmission.All
other bits (6, 7, 9, A, and F) give the status of abnormal transmit operation.
0000 0000 0000 1000
Event Register.
the preamble, there is a Loss-of-Carrier error and this bit is set. If Loss-of-CRSiE (Register 7,
TxCFG, Bit 6) is set, there is an interrupt.
times. If this does not happen, there is an SQE error and this bit is set. If SQEerroriE (Register
7, TxCFG, Bit 7) is set, there is an interrupt.
sion (Bit 9), and 16Coll (Bit F) must all be clear). If TxOKiE (Register 7, TxCFG, Bit 8) is set,
there is an interrupt.
this occurs, the CS8900A forces a bad CRC and terminates the transmission. If Out-of-window-
iE (Register 7, TxCFG, Bit 9) is set, there is an interrupt
ber logic and this bit is set. If JabberiE (Register 7, TxCFG, Bit A) is set, there is an interrupt.
Bit B is the LSB. If AnycolliE (Register 7, TxCFG, Bit B) is set, there is an interrupt when any
collision occurs.
particular packet. When this happens, the CS8900A stops further attempts to send that packet.
If 16colliE (Register 7, TxCFG, Bit F) is set, there is an interrupt.
Command Register. When reading this register, these bits will be 001001, where the LSB cor-
responds to Bit 0.
starts the packet transmit process.
These bits provide an internal address used by the CS8900A to identify this as the Transmitter
If the CS8900A is transmitting on the AUI and doesn't see Carrier Sense (CRS) at the end of
At the end of a transmission on the AUI, the CS8900A expects to see a collision within 64 bit
This bit is set if the last packet was completely transmitted (Jabber (Bit A), out-of-window-colli-
This bit is set if a collision occurs more than 512 bit times after the first bit of the preamble. When
If the last transmission is longer than 26 msec, then the packet output is terminated by the jab-
These bits give the number of transmit collisions that occurred on the last transmitted packet.
This bit is set if the CS8900A encounters 16 normal collisions while attempting to transmit a
These bits provide an internal address used by the CS8900A to identify this as the Transmit
This pair of bits determines how many bytes are transferred to the CS8900A before the MAC
E
6
TxPadDis
D
5
CIRRUS LOGIC PRODUCT DATASHEET
InhibitCRC
C
4
B
3
001001
Crystal LAN™ Ethernet Controller
A
2
Onecoll
1
9
CS8900A
Force
DS271F5
0
8