DS21455 Maxim Integrated Products, DS21455 Datasheet - Page 90

• Manufacturer Part Number: DS21455
• Description: Network Controller & Processor ICs Quad E1-T1-J1 Single -Chip Transceiver (S
• Manufacturer: Maxim Integrated Products

Specifications of DS21455

• Product: Framer
• Number Of Transceivers: 4
• Data Rate: 64 Kbps
• Supply Voltage (max): 3.465 V
• Supply Voltage (min): 3.135 V
• Supply Current (max): 328 mA
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Package / Case: BGA

Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bits 0 to 7/Frames Out of Sync Counter Bits 8 to 15 (FOS8 to FOS15). FOS15 is the MSB of the 16-bit frames out of sync
count.
Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bits 0 to 7/Frames Out of Sync Counter Bits 0 to 7 (FOS0 to FOS7). FOS0 is the LSB of the 16-bit frames out of sync
count.
15.4 E-Bit Counter Register (EBCR)
This counter is only available in the E1 mode. EBCR1 (EBCR1) is the most significant word and EBCR2
is the least significant word of a 16-bit counter that records far end block errors (FEBE), as reported in
the first bit of frames 13 and 15 on E1 lines running with CRC-4 multiframe. These count registers will
increment once each time the received E-bit is set to zero. Since the maximum E-bit count in a one-
second period is 1000, this counter cannot saturate. The counter is disabled during loss of sync at either
the FAS or CRC-4 level; it will continue to count if loss of multiframe sync occurs at the CAS level.
Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bits 0 to 7/E-Bit Counter Bits 8 to 15 (EB8 to EB15). EB15 is the MSB of the 16-bit E-bit count.
Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bits 0 to 7/E-Bit Counter Bits 0 to 7 (EB0 to EB7). EB0 is the LSB of the 16-bit E-bit count.
FOS15
FOS7
EB15
EB7
7
0
7
0
7
0
7
0
FOS14
FOS6
EB14
EB6
FOSCR1
Frames Out Of Sync Count Register 1
46h
FOSCR2
Frames Out Of Sync Count Register 2
47h
EBCR1
E-Bit Count Register 1
48h
EBCR2
E-Bit Count Register 2
49h
6
6
6
6
0
0
0
0
FOS13
FOS5
EB13
EB5
5
0
5
0
5
0
5
0
FOS12
FOS4
EB12
EB4
4
0
4
0
4
0
4
0
90 of 270
FOS11
FOS3
EB11
EB3
3
0
3
0
3
0
3
0
FOS10
FOS2
EB10
EB2
2
0
2
0
2
0
2
0
FOS9
FOS1
EB9
EB1
1
0
1
0
1
0
1
0
FOS8
FOS0
EB8
EB0
0
0
0
0
0
0
0
0