HD404054 Datasheet, PDF (64/101 Pages) Hitachi Semiconductor – HMCS400-series microcomputers designed to increase program productivity with large-capacity memory

HD404054 Series/HD404094 Series
SO₁
SCK₁
SI₁
Idle control
logic
I/O control
logic
Octal counter
(OC)
Clock
1/2
1/2
Serial interrupt
request flag
(IFS1)
Serial data
register
(SR1L/U)
Transfer
control
Selector
System ^øPER
clock
Prescaler S (PSS)
3
Serial mode register
1A (SM1A)
Serial mode register
1B (SM1B)
Figure 49 Block Diagram of Serial Interface 1
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