ICS1894-32
10BASE-T/100BASE-TX INTEGRATED PHYCEIVER WITH RMII INTERFACE
PHYCEIVER
Pin
Number
31
32
Pin
Name
P0/LED0
P1/ISO/LED1
Pin
Type
1
IO
IO
Pin Description
PHY address Bit 0 as input (during power on reset/hardware reset) and LED # 0
(function configurable, default is "activity/no activity") as output
PHY address Bit 1 as input (during power on reset/hardware reset) and LED # 1
(function configurable, default is "10/100 mode") as output; After latch, alternates as
a real time receiver isolation input.
PADDLE
Notes:
VSS
Ground Connect to ground.
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. MII Rx Mode: The RXD[3..0] bits are synchronous with RXCLK. When RXDV is asserted, RXD[3..0] presents
valid data to MAC on the MII interface. RXD[3..0] is invalid when RXDV is de-asserted.
3. 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.
4. MII Tx Mode: The TXD[3..0] bits are synchronous with TXCLK. When TXEN is asserted, TXD[3..0] presents valid
data from the MAC on the MII interface. TXD[3..0] has no effect when TXEN is de-asserted.
5. 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.
IDT®
10BASE-T/100BASE-TX INTEGRATED PHYCEIVER WITH RMII INTERFACE
4
ICS1894-32
REV K 060110
IDT [ INTEGRATED DEVICE TECHNOLOGY ]
