STIR4200 SigmaTel, STIR4200 Datasheet - Page 15

• Manufacturer Part Number: STIR4200
• Description: USB / IrDA Bridge Controller
• Manufacturer: SigmaTel

3-4200-D1-2.0-0403
Mode Register
Default State
Baud Rate Register
Default State
Bit Number Bit Mnemonic Access
Bit Number Bit Mnemonic Access
Operational Mode
7:0
7
6
5
4
3
2
1
0
SIR
FIR
6.1.2.
PDCLK (7 : 0)
FASTRXEN
FFRSTEN
FFSPRST
PDCLK(8)
Reserved
Table 14. Mode and Buad Rate Values for Required IrDA Modes of Operation
ASK
FIR
SIR
Mode and Baud Rate Registers
Offset 1 and 2
6.1.2.1.
Offset 1
6.1.2.2.
Offset 2
Below is a table of values to be written to the mode and baud rate registers to set
the required IrDA modes of operation:
FIR
7
0
7
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
RO
Reserved
115.2 Kbps
57.6 Kbps
38.4 Kbps
19.2 Kbps
4.0 Mbps
Mode Register
6
0
Baud Rate Register
9.6 Kbps
2.4 Kbps
6
1
Speed
When set, puts the infrared modulators into fast infrared mode (4PPM). Must
be mutually exclusive with the SIR bit.
Reserved. Write as zero.
When set, puts the infrared modulators into slow infrared mode. Must be
mutually exclusive with the FIR bit.
When set, puts the infrared modulators into amplitude shift keying infrared
mode.
Enables simultaneous reads and writes to/from the FIFO.
Allows the FIFO receive shift register to be automatically reset in FIR mode.
Manually resets the FIFO shift register. Must be set to ‘1’ to release the FIFO
shift register from reset.
MSB of baud rate register.
Sets the divide ratio of the PLL for the infrared modulator/demodulator.
Table 13. Baud Rate Register
Table 12. Mode Register
SIR
5
1
5
1
ASK
4
0
4
1
PDCLK(7: 0)
Mode Register
FASTRXEN FFRSTEN FFSPRST PDCLK(8)
0x80
0x20
0x20
0x20
0x20
0x20
0x21
Function
Function
3
0
3
0
USB/IrDA Bridge Controller
2
1
2
0
Baud Rate Register
1
1
1
0
0x1D
0x3B
0xDF
0x02
0x09
0x13
0x77
STIr4200
1
0
0
0
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