DMC73C168 Просмотр технического описания (PDF) - Daewoo Semiconductor

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производитель

DMC73C168

8Bit Single Chip Microcontroller

Daewoo Semiconductor 

8Bit Single Chip Microcontroller

38

DMC73C168

IOCTL2

P1 >0102

0 = INTn Inactive

1 = INTn Pending

Read

INT7

FLAG

O

INT7

ENABL

INT6

FLAG

O

O

INT6

ENABL

E

O

INT5

FLAG

O

INT5

ENABL

INT4

FLAG

O

O

INT4

ENABL

E

O

Bit

7

6

5

4

3

2

1

0

Write

INT7

CLEAR

INT7

ENABL

INT6

INT6

CLEAR ENABL

INT5

CLEAR

INT5

ENABL

X

INT4

ENABL

E

E

E

E

0 = No effect

1 = Clear INTn flag

0 = INTn disable

1 = INTn enable

Figure 5-3C I/O Control Register 2 (IOCTL2)

5.4 Interrupt Logic and External Interrupt

The internal interrupt logic for each eight maskable interrupt of DMC73C168 is shown in Figure 5-4A-1,

54A-2. This interrupt logic will detect the output of each corresponding interrupt and latch the interrupt

Flag.

INTn

FLAG

INTn

Write

ACKNOWLEDGE

Read

Enable Latch

OR

D

Q

INTn

Input

CLR

D

Q

AND

Interrupt FLAG

FLAG READ

Interrupt Enable

(Status Register)

Figure 5-4A-1. Interrupt Logic

INTn

Happen

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