W83977ATF Datasheet, PDF (93/207 Pages) Winbond – WINBOND I/O

W83977ATF
PRELIMINARY
4.8 Set6 - IR Physical Layer Control Registers
Address Offset Register Name
Register Description
0
IR_CFG2 Infrared Configure Register 2
1
MIR_PW MIR (1.152M bps or 0.576M bps) Pulse Width
2
SIR_PW SIR Pulse Width
3
SSR
Sets Select Register
4
HIR_FNU High Speed Infrared Flag Number
5
Reserved
-
6
Reserved
-
7
Reserved
-
4.8.1 Set6.Reg0 - Infrared Configure Register 2 (IR_CFG2)
This register controls ASK-IR, MIR, FIR operations.
Reg.
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
IR_CFG2 SHMD_N SHDM_N FIR_CRC MIR_CRC
-
Reset Value
0
0
1
0
0
Bit 2
Bit 1
INV_CRC DIS_CRC
0
0
Bit 0
-
0
Bit 7:
Bit 6:
Bit 5:
Bit 4:
SHMD_N - ASK-IR Modulation Disable
SHMD_N
Modulation Mode
0
IRTX modulate 500K Hz Square Wave
1
Re-rout IRTX
SHDM_N - ASK-IR Demodulation Disable
SHDM_N
Demodulation Mode
0
Demodulation 500K Hz
1
Re-rout IRRX
FIR_CRC - FIR (4M bps) CRC Type
FIR_CRC
CRC Type
0
16-bit CRC
1
32-bit CRC
Note that the 16/32-bit CRC are defined in IrDA 1.1 physical layer.
MIR_CRC - MIR (1.152M/0.576M bps) CRC Type
MIR_CRC
CRC Type
0
16-bit CRC
1
32-bit CRC
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Publication Release Date:April 1998
Revision 0.52