H8S-2350 RENESAS [Renesas Technology Corp], H8S-2350 Datasheet - Page 117
H8S-2350
Manufacturer Part Number
H8S-2350
Description
16-Bit Single-Chip Microcomputer
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.H8S-2350.pdf
(1025 pages)
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4.2.3
The H8S/2350 Group enters the reset state when the RES pin goes low.
To ensure that the H8S/2350 Group is reset, hold the RES pin low for at least 20 ms at power-up.
To reset the H8S/2350 Group during operation, hold the RES pin low for at least 20 states.
When the RES pin goes high after being held low for the necessary time, the H8S/2350 Group
starts reset exception handling as follows:
1. The internal state of the CPU and the registers of the on-chip supporting modules are
2. The reset exception handling vector address is read and transferred to the PC, and program
Figures 4.2 and 4.3 show examples of the reset sequence.
initialized, the T bit is cleared to 0 in EXR, and the I bit is set to 1 in EXR and CCR.
execution starts from the address indicated by the PC.
(1) Reset exception handling vector address ((1) = H'0000)
(2) Start address (contents of reset exception handling vector address)
(3) Start address ((3) = (2))
(4) First program instruction
RES
Internal
address bus
Internal read
signal
Internal write
signal
Internal data
bus
Reset Sequence
Figure 4.2 Reset Sequence (Modes 2 and 3)
Vector
fetch
(1)
(2)
Internal
processing
High
Rev. 3.00 Sep 15, 2006 page 83 of 988
Prefetch of first program
instruction
Section 4 Exception Handling
(3)
(4)
REJ09B0330-0300
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