参数资料
型号: DS26503L
英文描述: T1/E1/J1 BITS Element
中文描述: T1/E1/J1收发BITS的元素
文件页数: 84/123页
文件大小: 995K
代理商: DS26503L
DS26503 T1/E1/J1 BITS Element
84 of 123
Register Name:
Register Description:
Register Address:
Bit #
Name
Default
HW
Mode
Bit 0/Custom Line Driver Select (CLDS).
Setting this bit to a one will redefine the operation of the transmit line driver.
When this bit is set to a one and LIC1.5 = LIC1.6 = LIC1.7 = 0, then the device will generate a square wave at the TTIP and
TRING outputs instead of a normal waveform. When this bit is set to a one and LIC1.5 = LIC1.6 = LIC1.7 0, then the device
will force TTIP and TRING outputs to become open-drain drivers instead of their normal push-pull operation. This bit should
be set to zero for normal operation of the device.
Bit 1/Short Circuit Limit Disable (in E1 mode) (SCLD).
Controls the 50mA (rms) current limiter.
0 = enable 50mA current limiter
1 = disable 50mA current limiter
Bit 2/Unused, must be set = 0 for proper operation.
Bit 3/Jitter Attenuator Mux (JACKS).
Controls the source for JA CLOCK. This bit is only used in T1 mode.
0 = JA CLOCK sourced from the pre-scaled MCLK
1 = JA CLOCK sourced from internal PLL
Bit 4/Transmit Alarm Indication Signal (TAIS).
0 = transmit an unframed all-ones code
1 = transmit data normally
Bit 5/Insert BPV (IBPV).
A zero-to-one transition on this bit will cause a single BPV to be inserted into the transmit data
stream. Once this bit has been toggled from a zero to a one, the device waits for the next occurrence of three consecutive ones
to insert the BPV. This bit must be cleared and set again for a subsequent error to be inserted.
Bit 6/Line Interface Reset (LIRST).
Setting this bit from a zero to a one will initiate an internal reset that resets the clock
recovery state machine and recenters the jitter attenuator. Normally this bit is only toggled on power-up. Must be cleared and
set again for a subsequent reset.
Bit 7/Unused, must be set = 0 for proper operation.
LIC2
Line Interface Control 2
31h
7
0
6
5
4
3
2
0
1
0
LIRST
0
IBPV
0
TAIS
0
TAIS
PIN 10
JACKS
0
JACKS
PIN 46
SCLD
0
CLDS
0
0
0
0
0
0
0
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