Datasheet

DS21Q59 Quad E1 Transceiver
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Register Name:
CCR6
Register Description:
Common Control Register 6
Register Address:
2F Hex
Bit # 7 6 5 4 3 2 1 0
Name OTM1 OTM0 SRAS LTC/SC T16S — — RESET
NAME BIT FUNCTION
OTM1 7
Output Test Mode 1 (Table 8-C
)
OTM0 6
Output Test Mode 0 (Table 8-C
)
SRAS 5
Signaling Read Access Select. This bit controls the function of registers
SA1 through SA16 when reading.
0 = reading SA1–SA16 accesses receive signaling data
1 = reading SA1–SA16 accesses transmit signaling data
LTC/SC 4
Loss-of-Transmit Clock/Signaling Change-of-State Select. This bit
determines how the status register bit at SR2.2 operates.
0 = SR2.2 indicates loss-of-transmit clock
1 = SR2.2 indicates signaling data has changed states since the last
multiframe
T16S 3
Time Slot 16 Select. Transmit signaling insertion enable.
0 = signaling is not inserted into the transmit path from SA1–SA16
1 = signaling is inserted into the transmit path from SA1–SA16
— 2
Unused. Should be set = 0 for proper operation.
— 1
Unused. Should be set = 0 for proper operation.
RESET 0
Reset. A low-to-high transition of this bit resets all register bits to 0.
Table 8-C. Output Modes
OTM1 OTM0 OUTPUTS
0 0 Normal Operation
0 1 Outputs in Tri-State
1 0 Outputs Low
1 1 Outputs High