msm9405 Oki Semiconductor, msm9405 Datasheet - Page 25

• Manufacturer Part Number: msm9405
• Description: Irda Communication Controller
• Manufacturer: Oki Semiconductor

¡ Semiconductor
• MSR: Mode Select Register (Address = 6h)
is set to the initial value.
The MSR is used to select various modes of the MSM9405. When the system is reset, each bit
MSR[0-1]
MSR[2-3]
MSR[5-7]
MSR Bit
MSR[4]
MSR
7
MSR
6
IRSL (Infrared Mode Select): These bits are used to select the transfer mode as shown below.
The initial value is set to "00".
These bits are not used.
XT_SL (Crystal Select): This bit determines the crystal to be used.
The initial value is set to "0".
XT_SL = "0": 48 MHz crystal is used
XT_SL = "1": 18.432 MHz crystal is used
DRS (Data Rate Select): These bits determine the transfer rate as shown below. The initial value
is set to "001".
MSR
5
MSR
4
Encoding
IRSL
000
001
010
011
100
101
110
111
0
0
1
1
MSR
3
1
MSR
SIR Data Rate
2
115.2 kbps
19.2 kbps
38.4 kbps
57.6 kbps
2400 bps
9600 bps
reserved
reserved
IRSL
0
1
0
1
MSR
1
0
Description
MSR
Extended-SIR
0
MIR Data Rate
mode
MIR
0.576 Mbps
1.152 Mbps
SIR
FIR
reserved
reserved
reserved
reserved
reserved
reserved
IRSL
IRSL
Not Used
XT_SL ("0": 48 MHz "1": 18.432 MHz)
DRS (Data Rate Select)
0
1
(IrDA mode Select 0)
(IrDA mode Select 1)
FIR Data Rate
reserved
reserved
reserved
reserved
reserved
reserved
reserved
4 Mbps
MSM9405
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