参数资料
型号: 78P2352-IELR/F
厂商: Maxim Integrated Products
文件页数: 11/42页
文件大小: 0K
描述: IC LIU SDH SONET 2CH 128-LQFP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 1,000
类型: 线路接口装置(LIU)
驱动器/接收器数: 2/2
规程: E4,OC-3,STM1-E
电源电压: 3.15 V ~ 3.45 V
安装类型: 表面贴装
封装/外壳: 128-LQFP 裸露焊盘
供应商设备封装: 128-LQFP-EP(14x14)
包装: 带卷 (TR)
78P2352
Dual Channel
OC-3/ STM1-E/ E4 LIU
Page: 19 of 42
2006 Teridian Semiconductor Corporation
Rev. 2.4
PIN DESCRIPTION (CONTINUED)
CONTROL PINS
NAME
PIN
TYPE
DESCRIPTION
FRST
78
CIT
FIFO Phase-Initialization Control:
When asserted, the transmit FIFO pointers are reset to the respective
“centered” states. Also resets the FIERR interrupt bit. De-assertion edge of
FRSTx will resume FIFO operation.
Low: Channel 1 FRST assertion
Float: Normal operation
High: Channel 2 FRST assertion
Because the internal VCO clock and off-chip transmit clocks may not be
stable during transmit power-up, it is recommended to always reset the FIFOs
after powering up the IC or the transmitter.
Not valid during Plesiochronous Serial Mode.
LPBKx
17, 18
CIT
Analog Loopback Selection:
Low: Normal operation
Float: Remote Loopback Enable: Recovered receive data and clock
are looped back to the transmitter for retransmission.
High: Local Loopback Enable: The serial transmit data is looped back
and used as the input to the receiver.
CKMODE
15
CIT
Clock Mode Selection:
Selects the method of inputting transmit data into the chip. See
TRANSMITTER OPERATION section for more information.
In PARALLEL mode (SDI_PAR high):
Low: Parallel transmit clock is input to the 78P2352.
Float: Parallel transmit clock is input to the 78P2352. Loop-timing
mode enabled.
High: Parallel transmit clock is output from the 78P2352
In SERIAL mode (SDI_PAR low):
Low: Reference clock is synchronous to transmit clock and data.
Data is clocked in with SIxCKP/N and passed through a FIFO
Float: Reference clock is synchronous to transmit data. Clock is
recovered with a CDR and data is passed through a FIFO
High: Reference clock is plesiochronous to transmit data. Clock is
recovered with a CDR and the FIFO is bypassed
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