HD6433802H Datasheet, PDF (76/435 Pages) Hitachi Semiconductor – Single-Chip Microcomputer

When system power is turned on or off, the RES pin should be held low.
Figure 3.1 shows the reset sequence starting from RES input.
RES
Reset cleared
Program initial
Vector fetch Internal ^{instruction prefetch}
processing
ø
Internal
address bus
Internal read
signal
Internal write
signal
Internal data
bus (16-bit)
(1)
(2)
(2)
(3)
(1) Reset exception handling vector address (H'0000)
(2) Program start address
(3) First instruction of program
Figure 3.1 Reset Sequence
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