Datasheet

DS21Q59 Quad E1 Transceiver
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Table 20-A. OUTA and OUTB Function Select
OA3
OB3
OA2
OB2
OA1
OB1
OA0
OB0
FUNCTION
0 0 0 0
External Hardware Control Bit. In this mode, OUTA and OUTB can be used as simple
control pins for external circuitry. Use OA4 and OB4 to toggle OUTA and OUTB.
0 0 0 1
RCLK. Receive recovered clock.
0 0 1 0
Receive Loss-of-Sync Indicator. Real-time hardware version of SR1.0 (Table 9-A
).
0 0 1 1
Receive Loss-of-Carrier Indicator. Real-time hardware version of SR1.1 (Table 9-A
).
0 1 0 0
Receive Remote Alarm Indicator. Real-time hardware version of SR1.2 (Table 9-A
).
0 1 0 1
Receive Unframed All-Ones Indicator. Real-time hardware version of SR1.3 (Table 9-A
).
0 1 1 0
Receive Slip-Occurrence Indicator. One-clock-wide pulse for every slip of the receive
elastic store. Hardware version of SR1.4.
0 1 1 1
Receive CRC Error Indicator. One-clock-wide pulse for every multiframe that contains a
CRC error. Output forced to 0 during loss of sync.
1 0 0 0
Loss-of-Transmit Clock Indicator. Real-time hardware version SR2.2 (Table 9-A
).
1 0 0 1
RFSYNC. Recovered frame-sync pulse.
1 0 1 0
PRBS Bit Error. A half-clock-wide pulse for every bit error in the received PRBS pattern.
1 0 1 1
TDATA/RDATA. OUTB outputs an NRZ version of the transmit data stream (TDATA) prior
to the transmit line interface. OUTA outputs the received serial data stream (RDATA) prior
to the elastic store.
1 1 0 0
Receive CRC4 Multiframe Sync. Recovered CRC4 MF sync pulse.
1 1 0 1
Receive CAS Multiframe Sync. Recovered CAS MF sync pulse.
1 1 1 0
Transmit Current Limit. Real-time indicator that the TTIP and TRING outputs have
reached their 50mA current limit.
1 1 1 1
TPOS/TNEG Output. This mode outputs the AMI/HDB3 encoded transmit data. OUTA
outputs TNEG data. OUTB outputs TPOS data.