Revision 1.1
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G
SuperI/O Module
(Continued)
4.4.2.3
Table 4-9 lists the configuration registers which affect the
Infrared Communication Port (IRCP). Only the last register
LDN 02h - Infrared Communication Port
(F0h) is described here (Table 4-10). See Table 4-3 "Stan-
dard Configuration Registers" on page 71 for descriptions
of the other registers listed.
Table 4-9. Relevant IRCP Registers
Index
Type
Configuration Register or Action
Reset
Value
30h
R/W
Activate.
See also bit 0 of the SIOCF1 register.
00h
60h
R/W
Base Address MSB register.
Bits [7:3] (for A[15:11]) are RO, 00000b.
03h
61h
R/W
Base Address LSB register.
Bit [2:0] (for A[2:0]) are RO, 000b.
E8h
70h
R/W
Interrupt Number.
00h
71h
R/W
Interrupt Type.
Bit 1 is R/W; other bits are RO.
03h
74h
R/W
DMA Channel Select 0 (RX_DMA)
.
04h
75h
R/W
DMA Channel Select 1 (TX_DMA).
04h
F0h
R/W
Infrared Communication Port Configuration register.
02h
Table 4-10. IRCP Configuration Register
Bit
Description
Index F0h
Infrared Communication Port/Serial Port 3 Configuration Register (R/W)
Reset Value: 02h
7
Bank Select Enable.
Enables bank switching.
0: All attempts to access the extended registers are ignored. (Default)
1: Enables bank switching.
Reserved.
Busy Indicator.
(RO) This bit can be used by power management software to decide when to power-down the device.
0: No transfer in progress. (Default)
1: Transfer in progress.
Power Mode Control.
When the logical device is active in:
0: Low power mode - Clock disabled. The output signals are set to their default states. Registers are maintained. (Unlike
Active bit in Index 30h that also prevents access to device registers.)
1: Normal power mode - Clock enabled. The device is functional when the logical device is active. (Default)
TRI-STATE Control
. When enabled and the device is inactive, the logical device output pins are in TRI-STATE. One excep-
tion is the IRTX signal, which is driven to 0 when the Infrared Communication Port is inactive and is not affected by this bit.
0: Disabled. (Default)
1: Enabled when the device is inactive.
6:3
2
1
0