DS2155 Datasheet, PDF (195/240 Pages) Maxim Integrated Products – T1/E1/J1 Single-Chip Transceiver

DS2155
32. USER-PROGRAMMABLE OUTPUT PINS
The DS2155 provides four user-programmable output pins. The pins are automatically cleared to 0 at
power-up or as a result of a hardware- or software-issued reset.
Register Name:
Register Description:
Register Address:
CCR4
Common Control Register 4
73h
Bit #
Name
Default
7
RLT3
0
6
RLT2
0
5
RLT1
0
4
RLT0
0
3
UOP3
0
2
UOP2
0
1
UOP1
0
0
UOP0
0
Bit 0/User-Defined Output 0 (UOP0)
0 = logic 0 level at pin
1 = logic 1 level at pin
Bit 1/User-Defined Output 1 (UOP1)
0 = logic 0 level at pin
1 = logic 1 level at pin
Bit 2/User-Defined Output 2 (UOP2)
0 = logic 0 level at pin
1 = logic 1 level at pin
Bit 3/User-Defined Output 3 (UOP3)
0 = logic 0 level at pin
1 = logic 1 level at pin
Bits 4 to 7/Receive Level Threshold Bits (RLT0 to RLT3)
RLT3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
RLT2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
RLT1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
RLT0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Receive Level (dB)
Greater than -2.5
-2.5
-5.0
-7.5
-10.0
-12.5
-15.0
-17.5
-20.0
-22.5
-25.0
-27.5
-30.0
-32.5
-35.0
Less than -37.5
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