ICS1894-43
10BASE-T/100BASE-TX INTEGRATED PHYCEIVER WITH RMII INTERFACE PHYCEIVER
IDT®
10BASE-T/100BASE-TX INTEGRATED PHYCEIVER WITH RMII INTERFACE 4
ICS1894-43 REV A 030112
Notes:
1. AIO: Analog input/output PAD.
IO: Digital input/output.
IN/Ipu: Digital input with internal 20k pull-up.
IN/Ipd: Digital input with internal 20k pull-down.
IO/Ipu: Digital input/output with internal 20k pull-up.
IO/Ipd: Digital input/output with internal 20k pull-down.
2. RMII Rx Mode: The RXD[1:0] bits are synchronous with REFIN. For each clock period in which CRS_DV is
asserted, two bits of recovered data are sent from the PHY to the MAC.
3. RMII Tx Mode: The TXD[1:0] bits are synchronous with REFIN. For each clock period in which TX_EN is
asserted, two bits of data are received by the PHY from the MAC.
33 TXD1 Input Transmit data Bit 1 in RMII mode.
34 VSS Ground Connect to ground.
35 VSS Ground Connect to ground.
36 NC — No connect.
37 REF_IN Input 50MHz clock input for RMII mode.
38 P4/LED2 IO/Ipu PHY address Bit 4 as input (always latched high during power on reset and
hardware reset) and LED # 2 as output
39 P0/LED0 IO PHY address Bit 0 as input (during power on reset and hardware reset) and LED #
0(function configurable, default is "activity/no activity") as output
40 P1/ISO/LED1 IO PHY address Bit 1 as input (during power on reset and hardware reset) and LED #
1 (function configurable, default is "10/100 mode") as output
Pin
Number
Pin
Name
Pin
Type
Pin Description
