M16C26 Datasheet, PDF (19/239 Pages) Renesas Technology Corp – 16-BIT CMOS SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/20 SERIES

Udenvdeelropment
Preliminary Specifications Rev. 0.9
Specifications in this manual are tentative and subject to change.
Reset
M16C/26 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Software reset
When the PM0 register's PM03 bit is set “1” (microcomputer reset), the CPU, SFR, and pins of the
microcomputer are initialized similar to a hardware reset. After reset, the program is executed starting
from the address indicated by the reset vector.
Figure 1.5.2 shows the reset sequence and Figure 1.5.3 shows the status of the CPU registers after
reset.
Recommended
operating
VCC
voltage
RESET ^VCC
0V
RESET
0V
Equal to or less
than 0.2VCC
Equal to or less
than 0.2VCC
More than 20 cycles of XIN +2 ms are
needed.
Figure 1.5.1. Example reset circuit
VCC
XIN
Single chip
mode
RESET
BCLK
More than More than
2ms are 20 cycles
needed are needed
Address
BCLK 28cycles
FFFFC16
Content of reset vector
FFFFE16
Figure 1.5.2. Reset sequence
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