PC87317VUL Datasheet, PDF (187/272 Pages) National Semiconductor (TI) – PC87317VUL/PC97317VUL SuperI/O Plug and Play Compatible with ACPI Compliant Controller/Extender

Enhanced Serial Port with IR - UART2 (Logical Device 5)
DFR Bits
43210
11011
11101
min/max
min
max
min
max
001
51.90
57.36
54.38
60.10
DBW2-0 (Bits 7, 6 and 5 of IRRXDC)
010
49.54
60.55
51.90
63.44
011
47.39
64.11
49.65
67.17
100
45.41
68.12
47.58
71.37
101
43.60
72.66
45.68
76.13
110
41.92
77.85
43.92
81.57
TABLE 7-26. Consumer-IR Carrier Frequency Encoding
Encoding
MCFR Bits
43210
00000
00001
00010
00011
00100
00101
00110
00111
01000
01001
01010
01011
01100
01101
01110
...
11010
11011
11100
11101
11110
11111
Low Frequency
(TXHSC = 0)
reserved
reserved
reserved
30 KHz
31 KHz
32 KHz
33 KHz
34 KHz
35 KHz
36 KHz
37 KHz
38 KHz
39 KHz
40 KHz
41 KHz
...
53 KHz
54 KHz
55 KHz
56 KHz
56.9 KHz
reserved
High Frequency
(TXHSC = 1)
reserved
reserved
reserved
400 KHz
reserved
reserved
reserved
reserved
450 KHz
reserved
reserved
480 KHz
reserved
reserved
reserved
...
reserved
reserved
reserved
reserved
reserved
reserved
TABLE 7-27. Carrier Clock Pulse Width Options
Encoding
MCPW Bits
765
000
001
010
011
100
101
110
111
Low Frequency
(TXHSC = 0)
Reserved
Reserved
6 µsec
7 µsec
9 µsec
10.6 µsec
Reserved
Reserved
High Frequency
(TXHSC = 1)
Reserved
Reserved
0.7 µsec
0.8 µsec
0.9 µsec
Reserved
Reserved
Reserved
7.18.3 Consumer-IR Configuration Register (RCCFG),
This register control the basic operation of the Consumer-
IR mode. After reset, the content of this register is 00h.
Consumer-IR
7 6 5 4 3 2 1 0 _{Configuration Register}
0 0 0 0 0 0 0 0 Reset
(RCCFG)
Bank 7,
0
Required
Offset 02h
RC_MMD0
RC_MMD1
TXHSC
Reserved
RCDM_DS
RXHSC
T_OV
R_LEN
FIGURE 7-37. RCCFG Register Bitmap
Bits 1,0 - Transmitter Modulator Mode (RC_MMD(1,0))
Determines how infrared pulses are generated from the
transmitted bit string. (see Table 7-28).
187
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