cs5535 National Semiconductor Corporation, cs5535 Datasheet - Page 397

• Manufacturer Part Number: cs5535
• Description: Geode Cs5535 Companion Multi-function South Bridge
• Manufacturer: National Semiconductor Corporation

Revision 0.8
UART/IR Controller Register Descriptions
5.12.10.4 Bank Select Register (BSR)
I/O Offset
Type
Reset Value
BSR is the same as the BSR register at I/O Offset 03h in Bank 0. See Section 5.12.3.4 "Link Control/Bank Select Regis-
ters" on page 373 for bit descriptions.
Bit
1:0
4
3
2
Name
RCDM_DS
RSVD
TXHSC
RC_MMD[1:0]
03h
R/W
00h
Description
Receiver Demodulation Disable. When this bit is 1, the internal demodulator is dis-
abled. The internal demodulator, when enabled, performs carrier frequency checking and
envelope generation. This bit must be set to 1 (disabled) when the demodulation is per-
formed externally, or when oversampling mode is selected to determine the carrier fre-
quency.
Reserved. Write as 0.
Transmitter Subcarrier Frequency Select. This bit selects the modulation carrier fre-
quency range.
0: Low frequency: 30.0-56.9 kHz.
1: High frequency: 400-480 kHz.
Transmitter Modulator Mode. Determines how IR pulses are generated from the trans-
mitted bit string.
00: C_PLS modulation mode. Pulses are generated continuously for the entire logic 0 bit
01: 8_PLS modulation mode. 8 pulses are generated each time one or more logic 0 bits
10: 6_PLS Modulation Mode. 6 pulses are generated each time one or more logic 0 bits
11: Reserved. Result is indeterminate.
time.
are transmitted following a logic 1 bit.
are transmitted following a logic 1 bit.
RCCFG Bit Descriptions
397
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