DS21Q55N Maxim Integrated Products, DS21Q55N Datasheet - Page 73

• Manufacturer Part Number: DS21Q55N
• Description: Framer E1/J1/T1 3.3V 256-Pin BGA
• Manufacturer: Maxim Integrated Products

Specifications of DS21Q55N

• Package: 256BGA
• Number Of Transceivers: 4
• Standard Framing Format: E1|J1|T1
• Maximum Supply Current: 75(Typ) mA
• Minimum Single Supply Voltage: 3.135 V
• Maximum Single Supply Voltage: 3.465 V

10.
Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bit 0/Output Data Format (ODF)
Bit 1/TSYNC I/O Select (TSIO)
Bit 2/TSYNC Mode Select (TSM). Selects frame or multiframe mode for the TSYNC pin. See the timing
diagrams in Section 31.
Bit 3/TSYNC Double-Wide (TSDW). (Note: This bit must be set to 0 when IOCR1.2 = 1 or when IOCR1.1 = 0.)
Bit 4/RSYNC I/O Select (RSIO). (Note: This bit must be set to 0 when ESCR.0 = 0.)
Bit 5/RSYNC Mode Select 1(RSMS1). Selects frame or multiframe pulse when RSYNC pin is in output mode. In
input mode (elastic store must be enabled), multiframe mode is only useful when receive signaling reinsertion is
enabled. See the timing diagrams in Section 31.
Bit 6/RSYNC Mode Select 2 (RSMS2)
Bit 7/RSYNC Multiframe Skip Control (RSMS). Useful in framing format conversions from D4 to ESF. This
function is not available when the receive-side elastic store is enabled. RSYNC must be set to output multiframe
pulses (IOCR1.5 = 1 and IOCR1.4 = 0).
I/O PIN CONFIGURATION OPTIONS
0 = bipolar data at TPOSO and TNEGO
1 = NRZ data at TPOSO; TNEGO = 0
0 = TSYNC is an input
1 = TSYNC is an output
0 = frame mode
1 = multiframe mode
0 = do not pulse double-wide in signaling frames
1 = do pulse double-wide in signaling frames
0 = RSYNC is an output
1 = RSYNC is an input (only valid if elastic store enabled)
0 = frame mode
1 = multiframe mode
T1 Mode: RSYNC pin must be programmed in the output frame mode (IOCR1.5 = 0, IOCR1.4 = 0).
0 = do not pulse double-wide in signaling frames
1 = do pulse double-wide in signaling frames
E1 Mode: RSYNC pin must be programmed in the output multiframe mode (IOCR1.5 = 1, IOCR1.4 = 0).
0 = RSYNC outputs CAS multiframe boundaries
1 = RSYNC outputs CRC4 multiframe boundaries
0 = RSYNC outputs a pulse at every multiframe
1 = RSYNC outputs a pulse at every other multiframe
RSMS
7
0
RSMS2
IOCR1
I/O Configuration Register 1
01h
6
0
RSMS1
5
0
RSIO
4
0
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TSDW
0
3
TSM
2
0
TSIO
1
0
ODF
0
0