DS21455 Maxim Integrated Products, DS21455 Datasheet - Page 78

• Manufacturer Part Number: DS21455
• Description: Network Controller & Processor ICs Quad E1-T1-J1 Single -Chip Transceiver (S
• Manufacturer: Maxim Integrated Products

Specifications of DS21455

• Product: Framer
• Number Of Transceivers: 4
• Data Rate: 64 Kbps
• Supply Voltage (max): 3.465 V
• Supply Voltage (min): 3.135 V
• Supply Current (max): 328 mA
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Package / Case: BGA

13. I/O PIN CONFIGURATION OPTIONS
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.
Bit 3/TSYNC Double-Wide (TSDW) (T1 Only). (Note: This bit must be set to zero when IOCR1.2 = 1 or when
IOCR1.1 = 0.)
Bit 4/RSYNC I/O Select (RSIO). (Note: this bit must be set to zero 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 re-insertion is enabled.
Bit 6/RSYNC Mode Select 2 (RSMS2).
T1 Mode: RSYNC pin must be programmed in the output frame mode (IOCR1.5 = 0, IOCR1.4 = 0).
E1 Mode: RSYNC pin must be programmed in the output multiframe mode
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).
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
0 = RSYNC will output a pulse at every multiframe
1 = RSYNC will output a pulse at every other multiframe
0 = do not pulse double-wide in signaling frames
1 = do pulse double-wide in signaling frames
(IOCR1.5 = 1, IOCR1.4 = 0).
0 = RSYNC outputs CAS multiframe boundaries
1 = RSYNC outputs CRC-4 multiframe boundaries
RSMS
7
0
RSMS2
IOCR1
I/O Configuration Register 1
01h
6
0
RSMS1
5
0
RSIO
4
0
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TSDW
3
0
TSM
2
0
TSIO
1
0
ODF
0
0