ZUSBOPTSC01ZACG datasheet(79/282 Pages) ZILOG

79 / 282 page

PS022827-1212

P R E L I M I N A R Y

Interrupt Control Register Definitions

Z8 Encore! XP® F082A Series

Product Specification

Interrupt Request 2 Register

The Interrupt Request 2 (IRQ2) Register, shown in Table 37, stores interrupt requests for

both vectored and polled interrupts. When a request is presented to the interrupt controller,

the corresponding bit in the IRQ2 Register becomes 1. If interrupts are globally enabled

(vectored interrupts), the interrupt controller passes an interrupt request to the eZ8 CPU. If

interrupts are globally disabled (polled interrupts), the eZ8 CPU can read the Interrupt

Request 2 Register to determine if any interrupt requests are pending.

IRQ0 Enable High and Low Bit Registers

Table 38 describes the priority control for IRQ0. The IRQ0 Enable High and Low Bit reg-

isters, shown in Tables 39 and 40, form a priority-encoded enabling for interrupts in the

Interrupt Request 0 Register.

Table 37. Interrupt Request 2 Register (IRQ2)

Bit

Field

Reserved

PC3I

PC2I

PC1I

PC0I

RESET

00000000

R/W

R/WR/W

R/WR/WR/WR/WR/WR/W

Address

FC6H

Bit

Description

[7:4]

Reserved

These bits are reserved and must be programmed to 0000.

[3:0]



PCxI

Port C Pin x Interrupt Request

0 = No interrupt request is pending for GPIO Port C pin x.



1 = An interrupt request from GPIO Port C pin x is awaiting service.

Note: x indicates the specific GPIO Port C pin number (0–3).

Table 38. IRQ0 Enable and Priority Encoding

IRQ0ENH[x]IRQ0ENL[x]

Priority

Description

Disabled

Level 1

Low

Level 2

Medium

Level 3

High

Note: x indicates register bits 0–7.

ZUSBOPTSC01ZACG 数据表(PDF) 79 Page - Zilog, Inc.

ZUSBOPTSC01ZACG 数据表(HTML) 79 Page - Zilog, Inc.

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 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 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

数据表下载