2-6
Seiko Epson Corporation
S1C31D50 TECHNICAL MANUAL
(Rev. 1.00)
2.2.4.
Initialization Conditions (Reset Groups)
A different initialization condition is set for the CPU registers and peripheral circuit control bits,
individually. The reset group refers to an initialization condition. Initialization is performed when a
reset source included in a reset group issues a reset request. Table 2.2.4.1 lists the reset groups. For
the reset group to initialize the registers and control bits, refer to the
“CPU
and Deb
ugger”
chapter or
“Control
Re
gisters”
in each peripheral circuit chapter.
Table 2.2.4.1 List of
Reset
Groups
Reset group
Reset source
Reset cancelation timing
H0
#RESET pin POR and BOR
Reset request from the CPU
Key-entry reset
Supply voltage detector reset
Watchdog timer reset
Reset state is maintained for the reset
hold time tRSTR after the reset
request is canceled.
H1
#RESET pin POR and BOR
Reset request from the CPU
S0
Peripheral circuit software
reset (MODEN and SFTRST
bits. The software reset
operations de- pend on the
peripheral circuit.
Reset state is canceled immediately
after the reset request is canceled.
Summary of Contents for S1C31D50
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