HD6433937 Datasheet, PDF (294/521 Pages) Hitachi Semiconductor – Hardware Manual

Table 10-12 SMR and SCR3 Settings and Clock Source Selection
SMR SCR3
bit 7 bit 1 bit 0
Transmit/Receive Clock
COM
0
0
CKE1 CKE0 Mode
Clock Source SCK_3X Pin Function
0
0
Asynchronous Internal
0
1
mode
I/O port (SCK_3X pin not used)
Outputs clock with same frequency as bit rate
0
1
0
External
Outputs clock with frequency 16 times bit rate
1
0
0 Synchronous Internal
1
1
0
mode
External
Outputs serial clock
Inputs serial clock
0
1
1 Reserved (Do not specify these combinations)
1
0
1
1
1
1
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