DS3170 Maxim Integrated Products, DS3170 Datasheet - Page 138

• Manufacturer Part Number: DS3170
• Description: Network Controller & Processor ICs DS3-E3 Single-Chip T ransceiver T3-E3 Fra
• Manufacturer: Maxim Integrated Products

Bit 2: Receive Framer IO Signal Timing Select (RFTS). This bit controls the timing reference for the signals on
the receive framer interface IO pins. The pins controlled are RSER, RSOFO / RDEN. See
details.
Bit 1: Transmit Framer IO Signal Timing Select (TFTS). This bit controls the timing reference for the signals on
the transmit framer interface IO pins. The pins controlled are TSOFIn, TSER, and TSOFO / TDEN. See
for more details.
Bit 0: Transmit Line IO Signal Timing Select (TLTS). This bit controls the timing reference for the signals on the
transmit line interface IO pins. The pins controlled are TPOS / TDAT and TNEG. See
Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bit #
Name
Default
Bits 10 to 8: Loopback Mode [2:0] (LBM[2:0]). These bits select the loopback modes for analog loopback (ALB),
line loopback (LLB), payload loopback (PLB) and diagnostic loopback (DLB). See
select codes. Default: No Loopback.
Bits 7 to 4: General Purpose IO B Output Select[3:0] (GPIOB[3:0]) These bits determine which alarm status
signal to output on the GPIO2, pin. The GPIO pin must be enabled by setting the bits in the
GL.CR2
codes.
Bits 3 to 0: General Purpose IO A Output Select[3:0] (GPIOA[3:0]) These bits determine which alarm status
signal to output on the GPIO1 pin. The GPIO pin must be enabled for output by setting the bits in the
register. See
LBM[2:0]
10X
000
001
010
011
110
111
0 = Use output clocks for timing reference
1 = Use input clocks for timing reference
0 = Use output clocks for timing reference
1 = Use input clocks for timing reference
0 = Use output clocks for timing reference
1 = Use input clocks for timing reference
registers to output the selected alarm signal. See
GPIOB3
Table 10-15
15
--
0
7
0
ALB
0
1
0
0
0
0
0
GPIOB2
for configuration settings. See
14
--
0
6
0
LLB
0
0
1
0
0
1
0
PORT.CR4
Port Control Register 4
046h
PLB
GPIOB1
0
0
0
1
0
0
0
13
--
0
5
0
DLB
0
0
0
0
1
1
1
GPIOB0
138 of 230
12
--
0
4
0
Table 10-16
Table 10-15.
RESERVED
GPIOA3
11
0
3
0
below for the alarm select codes.
DS3170 DS3/E3 Single-Chip Transceiver
See
GPIOA2
LBM2
10
0
2
0
Table 10-16
Table 10-6
Table 10-17
GPIOA1
LBM1
9
0
1
0
Table 10-8
for the alarm select
for more details.
for the loopback
GL.GIOCR
GPIOA0
GL.GIOCR
Table 10-7
LBM0
for more
8
0
0
0
and