UPD75216ACW

Manufacturer Part NumberUPD75216ACW
Description4-BIT SINGLE-CHIP MICROCOMPUTER
ManufacturerNEC
UPD75216ACW datasheet
 


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
Page 21
22
Page 22
23
Page 23
24
Page 24
25
Page 25
26
Page 26
27
Page 27
28
Page 28
29
Page 29
30
Page 30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
Page 28/72:

INTERRUPT FUNCTIONS

Download datasheet (524Kb)Embed
PrevNext
6. INTERRUPT FUNCTIONS
The PD75216A has eight types of interrupt sources and can generate multiple interrupts with priority order.
It is also equipped with two types of test sources. INT2 is an edge detected testable input.
The PD75216A interrupt control circuit has the following functions:
Hardware-controller vectored interrupt function which can control interrupt acknowledge with the interrupt
enable flag (IE
) and the interrupt master enable flag (IME).
Function of setting any interrupt start address.
Multiple interrupt function which can specify priority order with the interrupt priority select register (IPS).
Interrupt request flag (IRQ
) test function. (Interrupt generation can be checked by software.)
Standby mode release function. (Interrupt to be released by interrupt enable flag can be selected.)
28
PD75216A