M30621ECGP MITSUBISHI [Mitsubishi Electric Semiconductor], M30621ECGP Datasheet - Page 14

• Manufacturer Part Number: M30621ECGP
• Description: SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
• Manufacturer: MITSUBISHI [Mitsubishi Electric Semiconductor]

Reset
14
Reset
Figure 1.6.1. Example reset circuit
Figure 1.6.2. Reset sequence
There are two kinds of resets; hardware and software. In both cases, operation is the same after the reset.
(See “Software Reset” for details of software resets.) This section explains on hardware resets.
When the supply voltage is in the range where operation is guaranteed, a reset is effected by holding the
reset pin level “L” (0.2V
level while main clock is stable, the reset status is cancelled and program execution resumes from the
address in the reset vector table.
Figure 1.6.1 shows the example reset circuit. Figure 1.6.2 shows the reset sequence.
X
RESET
Address
BCLK
Single chip
IN
mode
More than 20 cycles are needed
Example when V
RESET
CC
BCLK
max.) for at least 20 cycles. When the reset pin level is then returned to the “H”
V
CC
CC
24cycles
= 5V
.
FFFFC
RESET
V
5V
0V
5V
0V
CC
16
FFFFE
16
Content of reset vector
0.8V
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
4.0V
M16C / 62 Group (80-pin)
Mitsubishi microcomputers