78P2352
Dual Channel
OC-3/ STM1-E/ E4 LIU
PIN DESCRIPTION (CONTINUED)
SERIAL-PORT PINS
NAME
PIN TYPE DESCRIPTION
[SPSL=1] Serial-Port Enable:
High during read and write operations. Low disables the serial port.
While SEN is low, SDO remains in high impedance state, and SDI and
SCK activities are ignored.
SEN_CMI
95
96
CIU
CIS
CI
[SPSL=0] Medium Select:
Low: Fiber (NRZ pass-through) mode
High: CMI mode
[SPSL=1] Serial Clock:
Controls the timing of SDI and SDO.
[SPSL=0] Receive Monitor Mode Enable:
SCK_MON
When high, adds 20dB of flat gain to the incoming signal of both
channels before equalization.
NOTE: Channel specific monitor modes can be enabled through the
serial port. Rx Monitor Mode is only available in CMI mode
[SPSL=1] Serial Data Input:
Inputs mode and address information. Also inputs register data during
a Write operation. Both address and data are input least significant bit
first.
SDI_PAR
SDO_E4
94
93
[SPSL=0] Data Width Select:
Selects 4 bit parallel transmit modes (input high) or serial transmit
modes (input low)
[SPSL=1] Serial Data Output:
Outputs register information during a Read operation. Data is output
COZ/
CI
least significant bit first
[SPSL=0] Rate Select:
Selects E4 operation (input high) or STM1/STS3 operation (input low)
POWER AND GROUND PINS
It is recommended that all supply pins be connected to a single power supply plane and all ground pins be
connected to a single ground plane. See application note for decoupling guidelines.
NAME
PIN
TYPE DESCRIPTION
5, 12, 21, 74, 85, 92, 99, 105,
VCC
VDD
S
S
Power Supply
109, 116, 120, 126
23, 37, 40, 44, 48, 49, 53, 57, 60
CMOS I/O Driver Supply
6, 13, 16, 22, 73, 84, 91, 102,
108, 112, 113, 114, 115, 117,
123
GND
VSS
G
G
G
Ground
24, 36, 39, 43, 47, 50, 54, 58, 61
CMOS I/O Driver Ground
Trim Ground
Used during production test. Connect directly to
ground. Do not decouple to supply or PORB.
TGND
82
Page: 21 of 42
2006 Teridian Semiconductor Corporation
Rev. 2.4
TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
