W83977AF Information Storage Devices, Inc, W83977AF Datasheet - Page 87

• Manufacturer Part Number: W83977AF
• Description: W83877TF Plus Kbc, Cir, RTC
• Manufacturer: Information Storage Devices, Inc

Bit 7:
Bit 6:
Bit 5:
Bit 4:
Bit 3:
Bit 2:
Bit 1~0:
4.9.4 Set7.Reg3 - Sets Select Register (SSR)
Reading this register returns F4H. Select Register Set by writing a set number to this register.
Default Value
Reg.
SSR
P_PNB: Programming Pulse Number Coding.
Write a 1 to select programming pulse number coding. The code format is defined as
follows.
If the bit value is set to 0, the high pulse will be transmitted/received. If the bit value is
set to 1, then no energy will be transmitted/received.
SMP_M - Sampling Mode.
To select receiver sampling mode.
When set to 0 then uses T-period sampling, that the T-period is programmed IR baud
rate.
When set to 1, programmed baud rate will be used to do oversampling.
RXCFS - Receiver Carry Frequency Select
Reserved, write 0.
TX_CFS - Transmitter Carry Frequency Select.
Select low speed or high speed transmitter carry frequency.
RX_DM - Receiver Demodulation Mode.
TX_MM1~0 - Transmitter Modulation Mode 1~0
TX_MM1~0
Bit 7
Bit 7
1
00
01
10
11
TX_FCS
RX_DM
RXCFS
Bit 6
Bit 6
0
1
0
1
0
1
1
B7 B6 B5 B4
Bit 5
Bit 5
Bit value
8 pulses for logic 0 and no pulse for logic 1.
6 pulses for logic 0 and no pulse for logic 1
1
(Number of bits) - 1
- 75 -
Continuously send pulse for logic 0
Bit 4
Bit 4
TX Modulation Mode
1
B3
Disable internal decoder
Enable internal decoder
Demodulation Mode
Selected Frequency
Selected Frequency
Reserved.
B2 B1 B0
400K ~ 480K Hz
400K ~ 480K Hz
W83977F/ W83977AF
30K ~ 56K Hz
30K ~ 56K Hz
Bit 3
Bit 3
Publication Release Date: March 1998
0
Bit 2
Bit 2
1
PRELIMINARY
Bit 1
Bit 1
0
Revision 0.58
Bit 0
Bit 0
0