参数资料
型号: IDT82P2828BHG
厂商: IDT, Integrated Device Technology Inc
文件页数: 91/154页
文件大小: 0K
描述: IC LIU T1/J1/E1 28+1CH 640-PBGA
标准包装: 5
类型: 线路接口装置(LIU)
规程: E1
电源电压: 3.13 V ~ 3.47 V
安装类型: 表面贴装
封装/外壳: 640-BGA 裸露焊盘
供应商设备封装: 640-PBGA-EP(31x31)
包装: 托盘
其它名称: 82P2828BHG
IDT82P2828
28(+1) CHANNEL HIGH-DENSITY T1/E1/J1 LINE INTERFACE UNIT
Functional Description
41
February 6, 2009
3.3.7
TRANSMITTER POWER DOWN
Set the T_OFF bit (b5, TCF0,...) to ‘1’ will power down the corre-
sponding transmitter.
In this way, the corresponding transmit circuit is turned off. The pins
on the transmit line interface (including TTIPn and TRINGn) will be in
High-Z state. The input on the transmit system interface (including TDn,
TDPn, TDNn and TCLK) is ignored. The output on the transmit system
interface (i.e. TMFn) will be in High-Z state.
After clearing the T_OFF bit (b5, TCF0,...), it will take 1 ms for the
transmitter to achieve steady state, i.e., return to the previous configura-
tion and performance.
3.3.8
OUTPUT HIGH-Z ON TTIP AND TRING
TTIPn and TRINGn can be set to High-Z state globally or on a per-
channel basis.
The following three conditions will set TTIPn and TRINGn to High-Z
state globally:
Connecting the OE pin to low;
Loss of MCLK (i.e., no transition on MCLK for more than 1 ms);
Power on reset, hardware reset by pulling RST to low for more
than 2 s or global software reset by writing the RST register.
The following six conditions will set TTIPn and TRINGn to High-Z
state on a per-channel basis:
Writing ‘0’ to the OE bit (b6, TCF0,...);
Loss of TCLKn in Transmit Single Rail NRZ Format mode or
Transmit Dual Rail NRZ Format mode (i.e., no transition on TCLKn
for more than 64 XCLK1 cycles) except that the channel is in
Remote Loopback or transmit internal pattern with XCLK;
Transmitter power down;
Per-channel software reset by writing ‘1’ to the CHRST bit (b1,
Setting the THZ_OC bit (b4, TCF0,...) to ‘1’ when transmit driver
over-current is detected.
1. XCLK is derived from MCLK. It is 1.544 MHz in T1/J1 mode or 2.048 MHz
in E1 mode.
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