CHAPTER 3 INSTALLATION
User’s Manual U13742EJ2V0UM
32
3.5
Pin Mask Function Settings
3.5.1 Wait (WAIT) mask function
By setting switches 1 and 2 of DIP switch (SW3) in the IE-784225-NS-EM1, it is possible to mask the alternate
function (WAIT) of pin P66 in the
µ
PD784216A, 784218A, and 784225 Subseries.
Table 3-4. DIP Switch Setting for Wait (WAIT) Mask Function
DIP Switch Setting
Status
1 (WAITMSK)
2 (P66ON)
No mask (initial setting)
OFF
ON
Wait masked
ON
OFF
Caution
Do not set the DIP switch to settings other than those above.
3.5.2 Wait display function setting
By setting switch 3 of the DIP switch (SW3) in the IE-784225-NS-EM1, it is possible to display the status of
“waiting” with an LED light.
Table 3-5. DIP Switch Setting for Wait Display Function
DIP Switch Setting
Status
3 (WAITLED)
Wait (WAIT) status not displayed (initial setting)
OFF
Wait (WAIT) status displayed
ON
Caution
When pin P66 is used as a port pin, unless the DIP switch is turned OFF the LED may
light up.
3.5.3 NMI interrupt mask setting
By setting switch 5 of the DIP switch (SW3) in the IE-784225-NS-EM1, it is possible to mask the NMI interrupt,
which is the alternate function of the P02/INTP2 pin.
Table 3-6. DIP Switch Setting for NMI Interrupt Mask
DIP Switch Setting
Status
5
No NMI mask (initial setting)
ON
NMI masked
OFF
Caution
Because the NMI interrupt is the alternate function of the P02/INTP2 pin, this pin cannot
operate as the P02/INTP2 pin when the NMI mask status has been set.
Содержание IE-784225-NS-EM1
Страница 2: ...User s Manual U13742EJ2V0UM 2 MEMO...
Страница 49: ...User s Manual U13742EJ2V0UM 49 MEMO...
Страница 50: ...User s Manual U13742EJ2V0UM 50 MEMO...