DS21Q50L+ Maxim Integrated Products, DS21Q50L+ Datasheet - Page 26

• Manufacturer Part Number: DS21Q50L+
• Description: IC TXRX 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: *
• Includes: AIS Alarms Detector and Generator, Loopback Functions, PRBS Generator / Detector, Remote Detector and Generator
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power (watts): -

Table 4-1. Sync/Resync Criteria
Register Name:
Register Description:
Register Address:
Bit
Name
Note: See
NAME
MULTIFRAME
AEBE
TUA1
TFPT
TSA1
TSIO
TSM
IFSS
TSiS
FRAME OR
LEVEL
CRC4
CAS
FAS
Figure 19-9
IFSS
7
BIT
6
3
2
1
0
7
5
4
for more details about how the transmit control register affects the operation of the DS21Q50.
Internal Frame Sync Select
0 = TSYNC normal
1 = If TSYNC is in the INPUT mode (TSIO = 0) then TSYNC is internally replaced by the
recovered receive frame sync. The TSYNC pin is ignored.
1 = If TSYNC is in the OUTPUT mode (TSIO = 1), TSYNC outputs the recovered
multiframe frame sync.
Transmit Time Slot 0 Pass-Through
0 = FAS bits/Sa bits/remote alarm sourced internally from the TAF and TNAF registers
1 = FAS bits/Sa bits/remote alarm sourced from TSER
Automatic E-Bit Enable
0 = E-bits not automatically set in the transmit direction
1 = E-bits automatically set in the transmit direction
Transmit Unframed All Ones
0 = transmit data normally
1 = transmit an unframed all-ones code
Transmit International Bit Select
0 = sample Si bits at TSER pin
1 = source Si bits from TAF and TNAF registers (in this mode, TCR.6 must be set to 0)
Transmit Signaling All Ones
0 = normal operation
1 = force time slot 16 in every frame to all ones
TSYNC Mode Select
0 = frame mode (See the timing diagrams in Section 19.2.)
1 = CAS and CRC4 multiframe mode (See the timing diagrams in Section 19.2.)
TSYNC I/O Select
0 = TSYNC is an input
1 = TSYNC is an output
found and previous time slot
FAS present in frame N and
TFPT
N + 2, and FAS not present
16 contains code other than
Valid MF alignment word
Two valid MF alignment
words found within 8ms
6
TCR
Transmit Control Register
11 Hex
SYNC CRITERIA
in frame N + 1
all zeros
AEBE
5
TUA1
4
above criteria is met or three consecutive
Two consecutive MF alignment words
26 of 87
received; Alternate (RCR1.2 = 1) the
915 or more CRC4 codewords out of
incorrect bit 2 of non-FAS received
Three consecutive incorrect FAS
TSiS
3
RESYNC CRITERIA
FUNCTION
1000 received in error
received in error
TSA1
2
TSM
1
TSIO
0
4.2 and 4.3.2
ITU SPEC.
G.732 5.2
G.706
G.706
4.1.1
4.1.2