HD404358 Datasheet, PDF (63/102 Pages) Renesas Technology Corp – microcomputer has an A/D converter,

SO
SCK
SI
Idle
controller
I/O
controller
Octal
counter (OC)
Clock
1/2
1/2
HD404358 Series
Serial interrupt
request flag
(IFS)
Serial data
register (SR)
Transfer
control
signal
System ^{ø PER}
clock
Selector
3
Serial mode
register
(SMR)
Prescaler S (PSS)
Port mode
register C
(PMRC)
Figure 51 Serial Interface Block Diagram
Serial Interface Operation
Selecting and Changing the Operating Mode: Table 27 lists the serial interface’s operating modes. To
select an operating mode, use one of these combinations of port mode register A (PMRA: $004) and the
serial mode register (SMR: $005) settings; to change the operating mode, always initialize the serial
interface internally by writing data to the serial mode register. Note that the serial interface is initialized by
writing data to the serial mode register. Refer to the following Serial Mode Register section for details.
Table 27 Serial Interface Operating Modes
SMR
Bit 3
1
PMRA
Bit 1
0
1
Bit 0
0
1
0
1
Operating Mode
Continuous clock output mode
Transmit mode
Receive mode
Transmit/receive mode
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