DS21Q55 Maxim Integrated Products, DS21Q55 Datasheet - Page 178

• Manufacturer Part Number: DS21Q55
• Description: IC TXRX QUAD T1/E1/J1 SCT 256BGA
• Manufacturer: Maxim Integrated Products

Specifications of DS21Q55

• Function: Transceiver
• Interface: E1, J1, T1
• Number Of Circuits: 4
• Voltage - Supply: 3.14 V ~ 3.47 V
• Current - Supply: 75mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 256-BGA
• Includes: BERT Generator and Detector, Dual HDLC Controllers
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power (watts): -

Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bit 0/BERT in Synchronization Condition (BSYNC)
Bit 1/Receive Loss-of-Synchronization Condition (BRLOS)
Bit 2/Receive All-Zeros Condition (BRA0)
Bit 3/Receive All-Ones Condition (BRA1)
Bit 4/BERT Error-Counter Overflow Event (BECO)
Bit 5/BERT Bit-Counter Overflow Event (BBCO)
Bit 6/Bit-Error Detected Event (BBED)
BERT Alternating Word-Count Rate. When the BERT is programmed in the alternating word mode, the words
repeat for the count loaded into this register then flip to the other word and again repeat for the number of times
loaded into this register.
Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bits 0 to 7/Alternating Word-Count Rate Bits 0 to 7 (ACNT0 to ACNT7). ACNT0 is the LSB of the 8-bit
alternating word-count rate counter.
0 = interrupt masked
1 = interrupt enabled—interrupts on rising and falling edges
0 = interrupt masked
1 = interrupt enabled—interrupts on rising and falling edges
0 = interrupt masked
1 = interrupt enabled—interrupts on rising and falling edges
0 = interrupt masked
1 = interrupt enabled—interrupts on rising and falling edges
0 = interrupt masked
1 = interrupt enabled
0 = interrupt masked
1 = interrupt enabled
0 = interrupt masked
1 = interrupt enabled
ACNT7
—
7
0
7
0
ACNT6
BBED
6
0
IMR9
Interrupt Mask Register 9
27h
BAWC
BERT Alternating Word-Count Rate
DBh
6
0
ACNT5
BBCO
5
0
5
0
ACNT4
BEC0
4
0
4
0
178 of 237
ACNT3
BRA1
3
0
0
3
ACNT2
BRA0
2
0
2
0
BRLOS
ACNT1
1
0
1
0
BSYNC
ACNT0
0
0
0
0