KSZ8842-16_08 Datasheet, PDF (25/141 Pages) Micrel Semiconductor – 2-Port Ethernet Switch with Non-PCI Interface

Micrel, Inc.
Pin Number
26
Pin Name
EEEN
27
P1LED3
28
EEDO
29
EESK
30
EEDI
31
SWR
32
AEN
33
WRN
34
DGND
35
ADSN
36
PWRDN
37
AGND
38
VDDA
39
AGND
40
NC
41
NC
42
AGND
43
VDDA
44
NC
45
RXP1
46
RXM1
47
AGND
48
TXP1
49
TXM1
50
VDDATX
51
VDDARX
52
RXM2
53
RXP2
October 2007
KSZ8842-16/32 MQL/MVL/MVLI/MBL
Type
Ipd
Opd
Opd
Opd
Ipd
Ipd
Ipu
Ipd
Gnd
Ipd
Ipu
Gnd
P
Gnd
—
—
Gnd
P
—
I/O
I/O
Gnd
I/O
I/O
P
P
I/O
I/O
Pin Function
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 4µs (OBCR[1:0]=11 on-chip bus speed @ 25 MHz) or 800 ns (OBCR[1:0]=00
on-chip bus speed @ 125 MHz) serial output clock cycle to load configuration
data from the serial EEPROM.
EEPROM Data In
This pin is connected to DO output of the serial EEPROM when EEEN is pull-up.
This pin can be pull-down for 8-bit bus mode, pull-up for 16-bit bus mode or
don’t care for 32-bit bus mode when EEEN is pull-down (without EEPROM).
Synchronous Write/Read
Write/Read signal for synchronous bus accesses. Write cycles when high and
Read cycles when low.
Address Enable
Address qualifier for the address decoding, active Low.
Write Strobe Not
Asynchronous write strobe, active Low.
Digital IO ground
Address Strobe Not
For systems that require address latching, the rising edge of ADSN indicates the
latching moment of A15-A1 and AEN.
Full-chip power-down. Low = Power down; High or floating = Normal operation.
Analog ground
1.2V analog VDD input power supply from VDDCO (pin24) through external
Ferrite bead and capacitor.
Analog ground
No connect
No connect
Analog ground
1.2V analog VDD input power supply from VDDCO (pin24) through external
Ferrite bead and capacitor.
No connect
Port 1 physical receive (MDI) or transmit (MDIX) signal (+ differential)
Port 1 physical receive (MDI) or transmit (MDIX) signal (– differential)
Analog ground
Port 1 physical transmit (MDI) or receive (MDIX) signal (+ differential)
Port 1 physical transmit (MDI) or receive (MDIX) signal (– differential)
3.3V analog VDD input power supply with well decoupling capacitors.
3.3V analog VDD
Port 2 physical receive (MDI) or transmit (MDIX) signal (- differential)
Port 2 physical receive (MDI) or transmit (MDIX) signal (+ differential)
25
M9999-102207-1.9