ez80190 ZiLOG Semiconductor, ez80190 Datasheet - Page 150

• Manufacturer Part Number: ez80190
• Description: Ez80190 Microprocessor
• Manufacturer: ZiLOG Semiconductor

Interrupt Controller
PS006613-0306
Vector
0Ah
0Ch
0Eh
00h
02h
04h
06h
08h
10h
12h
14h
16h
The interrupt controller on the eZ80190 device routes the interrupt request signals
from the internal peripherals and external devices (via the internal port I/O) to the
eZ80
rupt function.
rupt sources are listed in order of their priority, with vector
priority interrupt.
When any one or more of the interrupt requests (IRQs) become active, an inter-
rupt request is generated by the interrupt controller and sent to the CPU. The cor-
responding 8-bit interrupt vector for the highest priority interrupt is placed on the 8-
bit interrupt vector bus, IVECT[7:0]. The interrupt vector bus is internal to the
eZ80190 device and is therefore not visible externally. The response time of the
CPU to an interrupt request is a function of the current instruction being executed
as well as the number of WAIT states being inserted. The interrupt vector, {I[7:0],
IVECT[7:0]}, is visible on the address bus, ADDR[16:0], when the Interrupt Ser-
vice Routine (ISR) begins. The response of the CPU to a vectored interrupt on the
eZ80190 device is explained in
eZ80
active until the ISR starts.
Port A 0
Source
DMA 0
DMA 1
MACC
PRT 0
PRT 1
PRT 2
PRT 3
PRT 4
PRT 5
UZI 0
UZI 1
®
®
CPU. On the eZ80190 device, all interrupts use the CPU’s vectored inter-
Mode 0, Mode 1, or Mode 2 interrupts. Interrupt sources are required to be
Table 74. Interrupt Vector Sources by Priority
Table 74
Vector
1Ah
1Ch
1Eh
2Ah
2Ch
2Eh
18h
20h
22h
24h
26h
28h
lists the vector for each of the interrupt sources. The inter-
Port A 1
Port A 2
Port A 3
Port A 4
Port A 5
Port A 6
Port A 7
Port B 0
Port B 1
Port B 2
Port B 3
Port B 4
Source
PRELIMINARY
Table
Vector
3Ch
3Ah
3Eh
30h
32h
34h
36h
38h
40h
42h
44h
46h
75. The eZ80190 device does not support
Port B 6
Port B 7
Port C 0
Port C 1
Port C 2
Port C 3
Port C 4
Port C 5
Port C 6
Port C 7
Port D 0
Port B 5
Source
eZ80190 Product Specification
Vector
4Ch
5Ch
4Ah
4Eh
5Ah
5Eh
48h
50h
52h
54h
56h
58h
00h
being the highest-
Reserved
Reserved
Reserved
Reserved
Reserved
Port D 1
Port D 2
Port D 3
Port D 4
Port D 5
Port D 6
Port D 7
Source
Interrupt Controller
136