DS21Q43AT Maxim Integrated Products, DS21Q43AT Datasheet - Page 19

• Manufacturer Part Number: DS21Q43AT
• Description: IC FRAMER E1 QUAD 5V IND 128TQFP
• Manufacturer: Maxim Integrated Products

Specifications of DS21Q43AT

• Controller Type: E1 Framer
• Interface: Parallel/Serial
• Voltage - Supply: 4.5 V ~ 5.5 V
• Current - Supply: 32mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 128-TQFP, 128-VQFP
• Dc: 0319
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

CCR1: COMMON CONTROL REGISTER 1 (Address=14 Hex)
FRAMER LOOPBACK
When CCR1.7 is set to a 1, the DS21Q43A will enter a Framer LoopBack (FLB) mode. This loopback is
useful in testing and debugging applications. In FLB, the DS21Q43A will loop data from the transmit
side back to the receive side. When FLB is enabled, the following will occur:
1. data will be transmitted as normal at TPOS and TNEG
2. data at RPOS and RNEG will be ignored
3. the receive side signals become synchronous with TCLK instead of RCLK.
(MSB)
FLB
SYMBOL
RHDB3
THDB3
RCRC4
TCRC4
TG802
RG802
RSM
FLB
THDB3
POSITION
CCR1.7
CCR1.6
CCR1.5
CCR1.4
CCR1.3
CCR1.2
CCR1.1
CCR1.0
TG802
NAME AND DESCRIPTION
Framer Loopback.
0=loopback disabled
1=loopback enabled
Transmit HDB3 Enable.
0=HDB3 disabled
1=HDB3 enabled
Transmit G.802 Enable. See Section 11 for details.
0=do not force TCHBLK high during bit 1 of timeslot 26
1=force TCHBLK high during bit 1 of timeslot 26
Transmit CRC4 Enable.
0=CRC4 disabled
1=CRC4 enabled
Receive Signaling Mode Select.
0=CAS signaling mode
1=CCS signaling mode
Receive HDB3 Enable.
0=HDB3 disabled
1=HDB3 enabled
Receive G.802 Enable. See Section 11 for details.
0=do not force RCHBLK high during bit 1 of timeslot 26
1=force RCHBLK high during bit 1 of timeslot 26
Receive CRC4 Enable.
0=CRC4 disabled
1=CRC4 enabled
TCRC4
19 of 60
RSM
RHDB3
RG802
RCRC4
DS21Q43A
(LSB)