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DM9161CI

10/100 Mbps Fast Ethernet Physical Layer Single Chip Transceiver

Davicom Semiconductor, Inc. 

DM9161CI

10/100 Mbps Fast Ethernet Physical Layer Single Chip Transceiver

34

RXCLK

O, Receive Clock

/10BTSER Z, The received clock provides the timing reference for the transfer of the

LI RXDV, RXD, and RXER. RXCLK is provided by PHY. The PHY may

(U) recover the RXCLK reference from the received data or it may derive the

RXCLK reference from a nominal clock

25MHz in 100Mbps MII mode, 2.5MHz in 10Mbps MII mode, 10MHz in

10Mbps GPSI (7-Wired) mode

10BTSER only support for 10M mode; (power up reset latch input)

0 = GPSI (7-Wired) mode in 10M mode

1 = MII mode in 100M mode

35

CRS

O, Carrier Sense Detect/ PHYAD[4]

/PHYAD[4] Z, Asserted high to indicate the presence of carrier due to receive or

LI transmit activities in half-duplex mode of 10BASE-T or 100BASE-TX. In

(D) repeater mode or full-duplex mode, this signal is asserted high to indicate

the presence of carrier due to receive activity only

This pin is also used as PHYAD [4] (power up reset latch input)

PHY address sensing input pin

36

COL

O, Collision Detection

/RMII

Z, Asserted high to indicate the detection of the collision conditions in half-

LI duplex mode of 10Mbps and 100Mbps. In full-duplex mode, this signal is

(D) always logical 0

Reduced MII enable:

This pin is also used to select Normal MII or Reduced MII. (power up

reset latch input)

0= Normal MII (default)

1= Reduced MII

This pin is always pulled low except used as reduced MII

37

RXDV

O, Receive Data Valid

/TESTMODE Z, Asserted high to indicate that the valid data is presented on the RXD [0:3]

LI Test mode control pin (power up reset latch input)

(D) 0 = normal operation (default)

1 = enable test mode

38

RXER/RXD[4] O, Receive Data Error/The Fifth RXD Data Bit of the 5B Symbol

/RPTR

Z, Asserted high to indicate that an invalid symbol has been detected

LI In decoder bypass mode (bypass BP4B5B), RXER becomes RXD [4], the

(D) fifth RXD data bit of the 5B symbol

This pin is also used to select Repeater or Node mode. (power up reset

latch input)

0 = Node Mode (default)

1 = Repeater Mode

31

LEDMODE I LED MODE Select

Reference LED function description

0: support Dual-LED

1: Normal LED

40

RESET#

I Reset

Active low input that initializes the DM9161CI.

8

Final

Version: DM9161CIIII-DS-F01

February 22, 2012

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