PD17225_15 Datasheet, PDF (51/86 Pages) Renesas Technology Corp – 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER

µPD17225, 17226, 17227, 17228
8.4 STOP Instruction Execution Conditions
The STOP instruction can be executed, only under special conditions, as shown in Table 8-5, to prevent the program
from hang-up.
If the conditions in Table 8-5 are not satisfied, the STOP instruction is treated as an NOP instruction.
Table 8-5. STOP Instruction Execution Conditions
Operand Value
1000B (08H)
Other Than Above
Execution Conditions
High level input for all P0A0-P0A3 and P0B0-P0B3 pins
Setting prohibited
8.5 Releasing Standby Mode
Operations for releasing the STOP and HALT modes will be as shown in Figure 8-1.
Figure 8-1. Operations After Standby Mode Release
(a) Releasing STOP mode by interrupt
Stanby
release signal
STOP
instruction
Operation
mode
STOP mode
Oscillation
Clock
Oscillation stops
Wait
(time set by TMM)
HALT mode
Oscillation
Operation
mode
(b) Releasing HALT mode by interrupt
HALT
instruction
Stanby
release signal
Operation
mode
HALT mode
Operation
mode
Clock
Oscillation
Remark The dotted line indicates the operation to be performed when the interrupt request, releasing the standby
mode, has been accepted.
Data Sheet U12643EJ2V0DS00
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