DS21Q50L Maxim Integrated Products, DS21Q50L Datasheet - Page 41

• Manufacturer Part Number: DS21Q50L
• Description: IC TRANSCEIVER E1 QUAD 100-LQFP
• Manufacturer: Maxim Integrated Products

Specifications of DS21Q50L

• Function: Transceiver
• Interface: E1
• Number Of Circuits: 4
• Voltage - Supply: 3.14 V ~ 3.47 V
• Current - Supply: 230mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 100-LQFP
• Includes: AIS Alarms Detector and Generator, Loopback Functions, PRBS Generator / Detector, Remote Detector and Generator
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power (watts): -

6.4 FAS Error Counter
FAS count register 1 (FASCR1) is the most significant word and FASCR2 is the least significant word of
a 16-bit counter that records word errors in the frame alignment signal (FAS) in time slot 0. This counter
is disabled when RLOS is high. FAS errors are not counted when the framer is searching for FAS
alignment and/or synchronization at either the CAS or CRC4 multiframe level. Since the maximum FAS-
word error count in a one-second period is 4000, this counter cannot saturate.
Register Name:
Register Description:
Register Address:
Bit
Name
Name
NAME
FAS15
FAS0
FAS15
FAS7
7
FASCR1.7
FASCR2.0
BIT
FAS14
FAS6
6
FASCR1, FASCR2
FAS Error Count Registers
06 Hex, 07 Hex
MSB of the 16-bit FAS error count
LSB of the 16-bit FAS error count
FAS13
FAS5
5
FAS12
FAS4
4
41 of 87
FAS11
FAS3
FUNCTION
3
FAS10
FAS2
2
FAS9
FAS1
1
FAS8
FAS0
0