KSZ8841-16MVL TR Micrel, KSZ8841-16MVL TR Datasheet - Page 23

• Manufacturer Part Number: KSZ8841-16MVL TR
• Description: Ethernet ICs Single Ethernet Port + Generic (8, 16-bit) bus interface(Lead Free)
• Manufacturer: Micrel

Specifications of KSZ8841-16MVL TR

• Rohs: yes
• Product: Ethernet Controllers
• Package / Case: LQFP-128
• Mounting Style: SMD/SMT

October 2007
Micrel, Inc.
Pin Number
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
EECS
EEEN
EEDO
EESK
Pin Name
SRDYN
INTRN
LDEVN
RDN
ARDY
CYCLEN
NC
DGND
VDDCO
VLBUSN
P1LED3
Type
Opu
Opd
Opd
Ipd
Opu
Opd
Ipd
Opd
Gnd
P
Ipd
Ipd
Opd
Opd
Opd
Pin Function
Synchronous Ready Not
Ready signal to interface with synchronous bus for both EISA-like and VLBus-like extend
accesses.
For VLBus-like mode, the falling edge of this signal indicates ready. This signal is
synchronous to the bus clock signal BCLK.
For burst mode (32-bit interface only), the KSZ8841M drives this pin low to signal wait
states.
Interrupt
Active Low signal to host CPU to indicate an interrupt status bit is set, this pin need an
external 4.7K pull-up resistor
Local Device Not
Active Low output signal, asserted when AEN is Low and A15-A4 decode to the
KSZ8841M address programmed into the high byte of the base address register. LDEVN
is a combinational decode of the Address and AEN signal.
Read Strobe Not
Asynchronous read strobe, active Low.
EEPROM Chip Select
This signal is used to select an external EEPROM device.
Asynchronous Ready
ARDY may be used when interfacing asynchronous buses to extend bus access cycles. It
is asynchronous to the host CPU or bus clock. this pin need an external 4.7K pull-up
resistor.
Cycle Not
For VLBus-like mode cycle signal; this pin follows the addressing cycle to signal the
command cycle.
For burst mode (32-bit interface only), this pin stays High for read cycles and Low for write
cycles.
No Connect
Digital IO ground
1.2V digital core voltage output (internal 1.2V LDO power supply output), this 1.2V output
pin provides power to VDDC, VDDA and VDDAP pins. It is recommended this ball should
be connected to 3.3V power rail by a 100 ohm resistor for the internal LDO application.
Note: Internally generated power voltage. Do not connect an external power supply to this
pin. This pin is used for connecting external filter (Ferrite bead and capacitors).
VLBus-like Mode
Pull-down or float: Bus interface is configured for synchronous mode.
Pull-up: Bus interface is configured for 32-bit asynchronous mode or EISA-like burst
mode.
EEPROM Enable
EEPROM is enabled and connected when this pin is pull-up.
EEPROM is disabled when this pin is pull-down or no connect.
Port 1 LED indicator
See the description in pins 3, 4, and 5.
EEPROM Data Out
This pin is connected to DI input of the serial EEPROM.
EEPROM Serial Clock
A 4
bus speed @ 125 MHz) serial output clock cycle to load configuration data from the serial
EEPROM.
µ
s (OBCR[1:0]=11 on-chip bus speed @ 25 MHz) or 800 ns (OBCR[1:0]=00 on-chip
23
KSZ8841-16/32 MQL/MVL/MBL
M9999-102207-1.6