AX88850 ASIX [ASIX Electronics Corporation], AX88850 Datasheet - Page 18

• Manufacturer Part Number: AX88850
• Description: 100BASE-TX/FX Repeater Controller
• Manufacturer: ASIX [ASIX Electronics Corporation]

2.7 Miscellaneous
LCLK or
TX_CLK
/RST
RST_DLY
DAISY_IN
DAISY_OUT
TEST
GEP[3:0]
MEDIA
OPTION
VDD
VSS
Signal Name Type Pin No.
AX88850
I/O/L
I/PU
I/PD
I/PD
I/PU
O/L
O/L
/PU
I
I
I
I
33,52,73,
39,60,79,
128,132,
156,171,
121,131,
144,153,
160,167,
176,185,
175-172 General Purpose I/O Pins : Those pins just for system application usage. I.e.
1,17,27,
9,23,28,
80,103,
93,113,
168
165
135
133
134
166
130
129
184
198
Local Clock : Must be run at 25Mhz . Used for transmit data to PHY devices,
Reset : The chip is reset when this signal is asserted Low.
Reset Delay : The signal is active high when reset and delay /RST signal
about 2 LCLK cycle. It is useful for power on configuration setup control of
/IR_ACTI[7:0].
Repeater Identification Number Daisy-Chain In : This pin is a daisy chain
serial input for Repeater ID. A state machine always monitor the input if a
correct data (RID) present at the pin, the (RID+1) will be written to RID
register and override the power on setup RID for the chip.
Repeater Identification Number Daisy-Chain Out : This pin is periodically
shift out the RID of itself to the next chained chip to inform that this ID has
already been occupied. The RID is shift out periodically every about 200us.
Test Pin : The pin is just for test mode setting purpose only. Must be pull low
when normal operation. When in test mode , GEP pins will be force to test
input signals.
for output control or input status report.
When reset the default function is for inputs.
Media selection :
External pull-down for AX88853 with 4.7K ohm resister.
External pull-up for AX88851, AX88852 and AX88854 with 4.7K ohm
resister.
Option : Option for repeater state machine. User must pull this pin up.
POWER : +5V +/-5%
POWER: 0V
18
Description
ASIX ELECTRONICS CORPORATION
PRELIMINARY