PCT2303N DATA SHEET
CONTROL REGISTERS
!!
CONTROL REGISTERS
Any register not listed here is reserved and should not be written. Undefined/unimplemented registers return 0.
Extended Modem ID
(Register 3Ch, R/W)
ID[1:0]
Reserved
LIN2
LIN1
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Reset settings (dependent on pins ID1 and ID0) = 0001h; 8002h; 4001h; Cxxxh
Bit Definitions:
Bits
15:14
Name
Description
ID[1:0]
Indicates CODEC configuration.
ID[1:0]
00
Description
Primary
01
Secondary
Secondary
Factory test
10
11
13:2
1
Reserved
LIN2
Reserved.
1 = 2nd line is supported; ID[1:0] = 10. CODEC data is transferred in slot 10.
1 = 1st line is supported; ID[1:0] = 01. CODEC data is transferred in slot 5.
0
LIN1
Extended Modem Status and Control
(Register 3Eh, R/W)
Reserved
15 14
PRF
PRE
PRD
PRC
PRB
PRA
Reserved
DAC2 ADC2 DAC1 ADC1 MREF GPIO
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Reset settings = FF00h
Bits 13:8 are read/write and control modem AFE subsystem power-down. When these bits are all set to 1, the
PCT303L is powered down. Bits 7:0 are read-only; 1 indicates modem AFE subsystem readiness.
Bit Definitions:
Bits
15:14
Name
Reserved
PRF
Description
Reserved.
13
12
11
10
9
1 = Modem line 2 DAC off.
1 = Modem line 2 ADC off.
1 = Modem line 1 DAC off.
1 = Modem line 1 ADC off.
Reserved for future use.
PRE
PRD
PRC
PRB
8
PRA
1 = GPIO power-down.
7:6
5
Reserved
DAC2
ADC2
DAC1
ADC1
MREF
GPIO
Reserved.
Read-only. 1 = Modem line 2 DAC ready.
Read-only. 1 = Modem line 2 ADC ready.
Read-only. 1 = Modem line 1 DAC ready.
Read-only. 1 = Modem line 1 ADC ready.
Read-only. 1 = Modem Vrefs up to nominal level.
Read-only. 1 = GPIO ready.
4
3
2
1
0
PC-TEL, Inc.
17
2303N0DOCDAT10A-0899
ETC [ ETC ]
