参数资料
型号: XRT83L38IB
厂商: Exar Corporation
文件页数: 69/87页
文件大小: 0K
描述: IC LIU T1/E1/J1 OCTAL 225BGA
标准包装: 84
类型: 线路接口装置(LIU)
驱动器/接收器数: 8/8
规程: T1,E1,J1
电源电压: 3.135 V ~ 3.465 V
安装类型: 表面贴装
封装/外壳: 225-BGA
供应商设备封装: 225-BGA(19x19)
包装: 托盘
XRT83L38
68
REV. 1.0.2
OCTAL T1/E1/J1 LH/SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
D6
CLKSEL2
Clock Select Inputs for Master Clock Synthesizer bit 2:
In Host mode, CLKSEL[2:0] are input signals to a programma-
ble frequency synthesizer that can be used to generate a mas-
ter clock from an external accurate clock source according to
the following table;
In Hardware mode, the state of these signals are ignored and
the master frequency PLL is controlled by the corresponding
Hardware
pins.
R/W
0
D5
CLKSEL1
Clock Select inputs for Master Clock Synthesizer bit 1:
See description of bit D6 for function of this bit.
R/W
0
D4
CLKSEL0
Clock Select inputs for Master Clock Synthesizer bit 0:
See description of bit D6 for function of this bit.
R/W
0
D3
MCLKRATE
Master clock Rate Select:
The state of this bit programs the
Master Clock Synthesizer to generate the T1/J1 or E1 clock.
The Master Clock Synthesizer will generate the E1 clock when
MCLKRATE = “0”, and the T1/J1 clock when MCLKRATE =
“1”.
R/W
0
D2
RXMUTE
Receive Output Mute:
Writing a “1” to this bit, mutes receive
outputs at RPOS/RDATA and RNEG/LCV pins to a “0” state for
any channel that detects an RLOS condition.
NOTE: RCLK is not muted.
R/W
0
D1
EXLOS
Extended LOS:
Writing a “1” to this bit extends the number of
zeros at the receive input of each channel before RLOS is
declared to 4096 bits. Writing a “0” reverts to the normal mode
(175+75 bits for T1 and 32 bits for E1).
R/W
0
D0
ICT
In-Circuit-Testing:
Writing a “1” to this bit configures all the
output pins of the chip in high impedance mode for In-Circuit-
Testing. Setting the ICT bit to “1” is equivalent to connecting
the Hardware ICT pin 88 to ground.
R/W
0
TABLE 36: MICROPROCESSOR REGISTER #129, BIT DESCRIPTION
20 48
15 44
MCLKE1
kHz
8
16
56
8
56
64
128
256
128
20 48
15 44
M CLKT1
kHz
15 44
X
15 44
X
20 48
15 44
20 48
CLKO UT/
kHz
15 44
20 48
15 44
20 48
15 44
20 48
15 44
20 48
15 44
20 48
15 44
20 48
15 44
0
1
CLKSEL0
0
1
0
1
0
1
0
CLKSEL1
1
0
1
0
1
0
CLKSEL2
0
1
0
1
0
1
0
15 44
20 48
X
20 48
15 44
0
1
0
1
M C LK RATE
1
0
1
0
1
0
1
0
1
0
1
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