PCT1789W DATA SHEET
PRELIMINARY
PCT303DW CONTROL REGISTERS
!!
PCT303DW CONTROL REGISTERS
Any register not listed here is reserved and should not be written.
Control 1
(Register 1, R/W)
SR
Reserved
DL
SB
7
6
5
4
3
2
1
0
Reset settings: 00h
Bit Definitions:
Bits
Name
SR
Description
7
Software reset.
1 = Sets all registers to their reset value.
0 = Enables chip for normal operation.
Bit automatically clears after being set.
6:2
1
Reserved
DL
Reserved. Read returns zero.
Isolation digital loopback. 1 = Enables digital loopback mode across isolation
barrier. Line side must be enabled prior to setting this mode.
0
SB
Serial digital interface mode.
1 = The serial port is operating in 16-bit mode and requires use of the secondary
frame sync signal, FC, to initiate control data reads/writes.
0 = Operation is in 15-bit mode and the LSB of the data field indicates whether a
secondary frame is required.
Control 2
(Register 2, R/W)
Reserved
AL
Reserved
HBE
RXE
7
6
5
4
3
2
1
0
Reset settings: 03h
Bit Definitions:
Bits
Name
Reserved
AL
Description
7:4
3
Reserved. Read returns zero.
Analog loopback. 1 = Enables analog loopback mode.
Reserved. Read returns zero.
2
Reserved
HBE
1
Hybrid enable. 1 = Connects transmit path in hybrid.
Receive enable. 1 = Enables receive path.
0
RXE
Control 3
(Register 3, R)
Reserved
7
6
5
4
3
2
1
0
Reset settings: 00h
Bit Definitions:
Bits
Name
Description
7:0
Reserved
Reserved. Read returns zero.
PRELIMINARY
PC-TEL, Inc.
41
1789W0DOCDAT06A-0299
ETC [ ETC ]
