cs5535 National Semiconductor Corporation, cs5535 Datasheet - Page 363

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

Revision 0.8
UART/IR Controller Register Descriptions
5.12.1 UART/IR Controller Specific MSRs
5.12.1.1
UART1 Primary Dongle and Modem Interface (UART[1]_MOD)
MSR Address
Type
Reset Value
UART2 Primary Dongle and Modem Interface (UART[2]_MOD)
MSR Address
Type
Reset Value
MSR_UART[x]_MOD is used for primary identification of the dongle interface and also provides the device with a virtual
modem interface. To run legacy software, the modem control bits are set such that the software sees the modem always
ready for data transfer.
Bit
3:0
MOD7
7
6
5
4
7
UART[x] Primary Dongle and Modem Interface (UART[x]_MOD)
Name
MOD7
MOD6
MOD5
MOD4
ID0-ID3
51400038h
R/W
0xh
5140003Ch
R/W
0xh
MOD6
6
Description
Modem 7. This bit directly sets the value of the Ring Indicator (RI) bit of the Modem Status
Register (Bank 0, I/O Offset 06h[6]).
Modem 6. This bit directly sets the value of the Data Set Ready (DSR) bit of the Modem Status
Register (Bank 0, I/O Offset 06h[5]).
Modem 5. This bit directly sets the value of the Data Carrier Detect (DCD) bit of the Modem
Status Register (Bank 0, I/O Offset 06h[7]).
Modem 4. This bit directly sets the value of the Clear to Send (CTS) bit of the Modem Status
Register (Bank 0, I/O Offset 06h[4]).
Primary Dongle Control Signals. This field selects the type of IR Dongle allowing software to
imitate the functionality of a real dongle. These bits are unused in UART mode.
x000: Infrared transceiver with serial interface and differential signalling.
x100: Reserved.
0010: IrDA-data transceiver is: Sharp RY5HD01 or Sharp RY5KD01.
1010: Reserved.
0110: Infrared transceiver with serial interface and single-ended signalling.
1110: Infrared transceiver supports consumer IR modes only.
0001: IrDA-data transceiver is: HP HSDL-2300 or HP HSDL-3600
1001: IrDA-data transceiver is: IBM 31T1100, Vishay-Telefunken TFDS6000 or Siemens
0101: Reserved.
1101: IrDA-data transceiver is: Vishay-Telefunken TFDS6500.
x011: IrDA-data transceiver is: HP HSDL-1100, HP HSDL-2100, TI TSML 1100 or Sharp
0111: IrDA-data transceiver supports SIR mode only.
1111: No dongle connected.
IRMS/T6400.
RY6FD11E.
MOD5
5
UART[x]_MOD Bit Descriptions
UART[x]_MOD Register Map
MOD4
4
363
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ID0
3
ID1
2
ID2
1
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ID3
0