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CHAPTER 18 DTP/EXTERNAL INTERRUPT CIRCUIT
18.4.2
DTP/interrupt Enable Register (ENIR)
The DTP/interrupt enable register (ENIR) enables and disables the output of interrupt
requests to the CPU.
■
DTP/interrupt Enable Register (ENIR)
Figure 18.4-3 DTP/interrupt Enable Register (ENIR)
Note:
Immediately before enabling the DTP/external interrupt (ENIR:EN=1), clear the corresponding DTP/
external interrupt request flag bit (EIRR:ER).
Addre
ss
R/W R/W
R/W R/W
Initi
a
l v
a
l
u
e
(EIRR)
0000
3
0
H
EN7 EN6 EN5 EN4 EN
3
EN2
EN1 EN0
00000000
B
Extern
a
l interr
u
pt re
qu
e
s
t en
ab
le
b
it
s
0
1
An extern
a
l interr
u
pt re
qu
e
s
t i
s
di
sab
led.
An extern
a
l interr
u
pt re
qu
e
s
t i
s
en
ab
led.
EN7
EN0
R/W R/W R/W R/W
R/W : Re
a
d/write en
ab
led
:
Initi
a
l v
a
l
u
e
b
it
0
1
2
3
4
5
6
7
8
15
Table 18.4-2 Function Description of Each Bit of the DTP/interrupt Enable Register (ENIR)
Bit name
Function
bit7
to
bit0
EN7 to EN0:
External interrupt
request enable bits
Each of these bits enables and disables the output of interrupt requests to the CPU. If
these bits and corresponding bits ER7 to ER0 of the DTP/interrupt cause register
(EIRR) are "1", an interrupt request is output to the CPU.
(References)
•
To use a DTP/external interrupt pin, write "0" to the corresponding bit of the
port direction register to set the pin as an input port.
•
The states of the DTP/external interrupt pins can be read directly using the port
data register regardless of the states of external interrupt request enable bits.
•
Bits ER7 to ER0 of the DTP/interrupt cause register (EIRR) are set to "1" if an
interrupt cause is detected regardless of the values of external interrupt request
enable bits.
Содержание MB90460 Series
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Страница 41: ...22 CHAPTER 1 OVERVIEW ...
Страница 45: ...26 CHAPTER 2 NOTES ON HANDLING DEVICES ...
Страница 83: ...64 CHAPTER 3 CPU ...
Страница 95: ...76 CHAPTER 4 RESET ...
Страница 107: ...88 CHAPTER 5 CLOCK ...
Страница 131: ...112 CHAPTER 6 LOW POWER CONSUMPTION MODE ...
Страница 175: ...156 CHAPTER 7 INTERRUPT ...
Страница 181: ...162 CHAPTER 8 MODE SETTING ...
Страница 223: ...204 CHAPTER 9 I O PORT ...
Страница 237: ...218 CHAPTER 10 TIME BASE TIMER ...
Страница 247: ...228 CHAPTER 11 WATCHDOG TIMER ...
Страница 275: ...256 CHAPTER 12 16 BIT RELOAD TIMER ...
Страница 373: ...354 CHAPTER 14 MULTI FUNCTIONAL TIMER ...
Страница 485: ...466 CHAPTER 16 PWC Timer ...
Страница 531: ...512 CHAPTER 17 UART ...
Страница 559: ...540 CHAPTER 19 DELAYED INTERRUPT GENERATOR MODULE ...
Страница 589: ...570 CHAPTER 20 8 10 BIT A D CONVERTER ...
Страница 601: ...582 CHAPTER 21 ROM CORRECTION FUNCTION ...
Страница 633: ...614 CHAPTER 23 512K 1024K BIT FLASH MEMORY ...
Страница 645: ...626 CHAPTER 24 EXAMPLE OF F2 MC 16LX MB90F462 F462A F463A CONNECTION FOR SERIAL WRITING ...
Страница 715: ...696 APPENDIX ...
Страница 716: ...697 INDEX INDEX The index follows on the next page This is listed in alphabetic order ...
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