8-Bit Serial I/O Operation In Each Mode - Fujitsu F2MC-8L F202RA Hardware Manual

14.8

8-Bit Serial I/O Operation in Each Mode

This section describes the operation of the 8-bit serial I/O if the 8-bit serial I/O switches
to sleep or stop mode or a stop request is issued when it is in operation.
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When the Internal Shift Clock is Used
● 8-bit serial I/O operation in sleep mode
In sleep mode, as shown in Figure 14.8-1 , the 8-bit serial I/O continues data transfer without stopping the
serial I/O operation.
Figure 14.8-1 8-bit Serial I/O Operation in Sleep Mode (Internal Shift Clock)
SCK output
SST bit
SIOF bit
SO pin output
SLP bit
(STBC register)
● 8-bit serial I/O operation in stop mode
In stop mode, as shown in Figure 14.8-2 , the 8-bit serial I/O stops the serial I/O operation and suspends
data transfer. After stop mode has been released, reinitialize the 8-bit serial I/O because operation is
resumed halfway.
#0 #1 #2 #3
CHAPTER 14 8-BIT SERIAL I/O
#4 #5 #6 #7
Sleep mode
Sleep mode release via IRQC
Clear via program
Interrupt request
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