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M16C/62P Group (M16C/62P, M16C/62PT)
Table 10.4 Pin Status During Wait Mode
Pin
A0 to A19, D0 to D15, CS0 to CS3,
________
BHE
_____
______
________ _________
RD, WR, WRL, WRH
HLDA, BCLK
ALE
I/O ports
CLKOUT
When fC selected
When f8, f32 selected
Table 10.5 Interrupts to Exit Wait Mode
Interrupt
NMI Interrupt
Serial I/O Interrupt
Key Input Interrupt
A/D Conversion
Interrupt
Timer A Interrupt
Timer B Interrupt
INT Interrupt
Table 10.5 lists the interrupts to exit wait mode.
If the microcomputer is to be moved out of wait mode by a peripheral function interrupt, set up the
following before executing the WAIT instruction.
(1) Set the ILVL2 to ILVL0 bits in the interrupt control register, for peripheral function interrupts used
to exit wait mode,
The ILVL2 to ILVL0 bits in all other interrupt control registers, for peripheral function interrupts not
used to exit wait mode, are set to "000b" (interrupt disable).
(2) Set the I flag to "1".
(3) Start operating the peripheral functions used to exit wait mode.
When the peripheral function interrupt is used, an interrupt routine is performed as soon as an
interrupt request is acknowledged and the CPU clock is supplied again.
When the microcomputer exits wait mode by the peripheral function interrupt, the CPU clock is the
same clock as the CPU clock executing the WAIT instruction.
R
e
. v
2
3 .
0
S
e
p
0
, 1
2
0
0
4
R
E
J
0
9
B
0
1
8
5
0 -
2
3
0
Z
_______
_______
Retains status before wait mode
"H"
"H"
"L"
Retains status before wait mode
Does not become a CLKOUT
pin.
CM02=0
Can be used
Can be used when operating
with internal or external clock
Can be used
Can be used in one-shot mode
or single sweep mode
Can be used in all modes
Can be used
page 79
f o
3
6
4
Memory Expansion Mode
Microprocessor Mode
CM02=1
Can be used
Can be used when operating
with external clock
Can be used
(Do not use)
Can be used in event counter
mode or when the count
source is fC32
Can be used
10. Clock Generating Circuit
Single-Chip Mode
Does not become a bus
control pin.
Retains status before wait mode
Does not stop
Does not stop when the CM02
bit is "0".
When the CM02 bit is "1", the
status immediately prior to
entering wait mode is main-
tained.
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