M30620FCAFP Mitsubishi, M30620FCAFP Datasheet - Page 39
M30620FCAFP
Manufacturer Part Number
M30620FCAFP
Description
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Manufacturer
Mitsubishi
Datasheet
1.M30620FCAFP.pdf
(274 pages)
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Wait Mode
Wait Mode
Table 1.10.3. Port status during wait mode
__________
When a WAIT instruction is executed, the BCLK stops and the microcomputer enters the wait mode. In this
mode, oscillation continues but the BCLK and watchdog timer stop. Writing “1” to the WAIT peripheral
function clock stop bit and executing a WAIT instruction stops the clock being supplied to the internal
peripheral functions, allowing power dissipation to be reduced. Table 1.10.3 shows the status of the ports in
wait mode.
Wait mode is cancelled by a hardware reset or an interrupt. If an interrupt is used to cancel wait mode, the
microcomputer restarts from the interrupt routine using as BCLK, the clock that had been selected when the
WAIT instruction was executed.
Address bus, data bus, CS0 to CS3
_____
RD, WR, BHE, WRL, WRH
HLDA,BCLK
ALE
Port
CLK
OUT
______ ________ ________ _________
Pin
When f
When f
_______
C
8
, f
selected
32
selected Valid only in single-chip mode
_______
Retains status before wait mode
“H”
“H”
“H”
Retains status before wait mode
Valid only in single-chip mode
Memory expansion mode
Microprocessor mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Retains status before wait mode
Does not stop
Does not stop when the WAIT
peripheral function clock stop
bit is “0”.
When the WAIT peripheral
function clock stop bit is “1”,
the status immediately prior
to entering wait mode is main-
tained.
Single-chip mode
M16C / 62A Group
Mitsubishi microcomputers
39
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