Fujitsu F2MC-8L F202RA Hardware Manual page 334

CHAPTER 14 8-BIT SERIAL I/O
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Block Diagram for 8-bit Serial I/O Pins
PDR
PDR read
PDR read
(At read-modify-write)
PDR write
DDR write
PUL read
PUL write
Note:
When "pull-up resistor available" is selected in the pull-up setting register, the pin state in stop mode
(SPL = 1) becomes high (pull-up state), not Hi-Z. During the reset, however, pull-up becomes invalid
and the pin state becomes Hi-Z.
318
Figure 14.3-1 Block Diagram for 8-bit Serial I/O Pins
Resource output
Output latch
DDR
Stop mode
(SPL=1)
PUL
SCK
SI
Stop mode (SPL = 1)
Resource Resource
output
output
enable
available
P30/UCK/SCK
P32/UI/SI
Pull-up resistor
Pch
Pin
P30/UCK/SCK
Nch
P31/UO/SO
P32/UI/SI