W742C814 データシートの表示（PDF） - Winbond

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W742C814

4-BIT MICROCONTROLLER

Winbond 

W742C814

Divider 0

overflow signal

SQ

R

Timer 0

underflow signal

SQ

R

RC port

signal change

SQ

R

Divider 1

overflow signal

SQ

R

Timer 1

underflow signal

SQ

R

Initial Reset

EN INT

MOV IEF,#I

EVF.0

IEF.0

EVF.1

IEF.1

EVF.2

IEF.2

EVF.4

EVF.7

IEF.4

IEF.7

Enable

Interrupt

Process

Circuit

Interrupt

Vector

Generator

004H

008H

00CH

014H

020H

Initial Reset

Disable

CLR EVF,#I instruction

DIS INT instruction

Figure 6-8 Interrupt event control diagram

6.13 Stop Mode Operation

In stop mode, all operations of the µC cease, and the MFP pin is kept to high. The µC enters stop

mode when the STOP instruction is executed and exits stop mode when an external trigger is

activated (by a falling signal on the RC). When the designated signal is accepted, the µC awakens

and executes the next instruction. To prevent erroneous execution, the NOP instruction should follow

the STOP command. But In the dual-clock slow operation mode, the STOP instruction will also disable

the Fslow-oscillator oscillating; the µC system will be all cease. By the way, the SCR value will be

reset as XX00B when µC was wakeup in STOP mode. User should update the SCR value by self.

6.13.1 Stop Mode Wake-up Enable Flag for RC Port (SEF)

The stop mode wake-up flag for port RC is organized as an 4-bit binary register (SEF.0 to SEF.3).

Before port RC may be used to make the device exit the stop mode, the content of the SEF must be

set first. The SEF is controlled by the MOV SEF, #I instruction. The bit descriptions are as follows:

3210

SEF w w w w

Note: W means write only.

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