HD404318 Datasheet, PDF (44/68 Pages) Hitachi Semiconductor – 4-bit HMCS400-series microcomputer

HD404318 Series
Serial Interface
The MCU has a one-channel serial interface built in with the following features.
• One of 13 different internal clocks or an external clock can be selected as the transmit clock. The
internal clocks include the six prescaler outputs divided by two and by four, and the system clock.
• During idle states, the serial output pin can be controlled to be high or low output
• Transmit clock errors can be detected
• An interrupt request can be generated after transfer has completed when an error occurs
Table 10
SMR
Bit 3
1
Serial Interface Operating Modes
PMRA
Bit 1
0
1
Bit 0
0
1
0
1
Operating Mode
Continuous clock output mode
Transmit mode
Receive mode
Transmit/receive mode
42