Oki MSM9225B, User Manual

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MSM9225B User’s Manual
Chapter 2 Register Descriptions
2 – 28
(1) Input/output mode setting: OCMD1 to OCMD0
These bits are used to set the output mode of output pins Tx0 and Tx1 and the input mode of input pins
Rx0 and Rx1.
Table 2-9 shows the relationship between the bit content and input/output mode.
At reset, OCMD1 to OCMD0 are set to “00”.
Table 2-9 Input/output Mode Setting
OCMD1 OCMD0 Output mode of Tx0 and Tx1 Input mode of Rx0, Rx1
0 0
0 1
[Disabled]
1 0
[Single-phase mode]
Same bit string data is output from both Tx0 and Tx1.
Output example
Data
Tx0
Tx1
1 1
[Clock output mode]
Bit string data is output from Tx0.
Synchronization clock is output from Tx1.
Output example
Data
Tx0
Tx1
[differential input mode]
1 0 1 0 1 0
1 0 1 0 1 0
Rx0
Rx1
+
–