DS21FF44 Maxim Integrated Products, DS21FF44 Datasheet - Page 37

• Manufacturer Part Number: DS21FF44
• Description: IC FRAMER E1 4X4 16CH 300-BGA
• Manufacturer: Maxim Integrated Products

Specifications of DS21FF44

• Controller Type: E1 Framer
• Interface: Parallel/Serial
• Voltage - Supply: 2.97 V ~ 3.63 V
• Current - Supply: 300mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 300-BGA
• 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 one, the framer will enter a Framer LoopBack (FLB) mode. See Figure 6–1 for
more details. This loopback is useful in testing and debugging applications. In FLB, the framer 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 input by RPOS and RNEG will be ignored.
3) The RCLK output will be replaced with the TCLK input.
(MSB)
FLB
SYMBOL
THDB3
RHDB3
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
Framer Loopback
0 = loopback disabled
1 = loopback enabled
Transmit HDB3 Enable
0 = HDB3 disabled
1 = HDB3 enabled
Transmit G.802 Enable. See Section 22 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 22 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
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RSM
NAME AND DESCRIPTION
RHDB3
RG802
RCRC4
(LSB)