M30622ECTFP MITSUBISHI [Mitsubishi Electric Semiconductor], M30622ECTFP Datasheet - Page 15

• Manufacturer Part Number: M30622ECTFP
• Description: SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
• Manufacturer: MITSUBISHI [Mitsubishi Electric Semiconductor]

Reset
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.
Note 1: In M30623(80-pin package), the BYTE signal has no external pin, and is internally connected to
Note 2: M16C/62T group is not guaranteed to operate in memory expansion and microprocessor modes.
Note 3: M30623(80-pin package) is not provided with the chip select signals (CS0 to CS3).
Microprocessor
Microprocessor
Single chip
Example when Vcc=5V.
RESET
BCLK
X
Address
RD
WR
CS0
Address
RD
WR
CS0
Address
BYTE = “L”
BYTE = “H”
IN
mode
mode
mode
the CNV
(“H”)
(“H”)
RESET
SS
More than 20 cycles are needed
signal. Accordingly, in the microprocessor mode, BYTE = CNV
CC
max.) for at least 20 cycles. When the reset pin level is then returned to the “H”
Vcc
BCLK 24 cycles
RESET
FFFFC
Vcc
FFFFC
FFFFC
16
5V
0V
5V
0V
16
16
15
FFFFE
Content of reset vector
16
FFFFD
FFFFE
16
4.0V
0.8V
16
More than 20 cycles of X
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
FFFFE
Content of reset vector
16
SS
Mitsubishi microcomputers
= Vcc.
M16C / 62T Group
IN
Content of reset vector
are needed.