Z86C08 datasheet(29/34 Pages) ZILOG

29 / 34 page

Z86C04/C08

Zilog

CMOS 8-Bit Low-Cost 1K/2K-ROM Microcontrollers

DS97DZ80502

P R E L I M I N A R Y

Figure 24. Port 0 and 1 Mode Register

(F8

H: Write Only)

Figure 25. Interrupt Priority Register (F9

H: Write Only)

Figure 26. Interrupt Request Register (FA

Read/Write)

P0 - P0 Mode

00 = Output

01 = Input

Reserved (Must be 0.)

Must be 1.

R248 P01M

D7 D6 D5 D4 D3 D2 D1 D0

Interrupt Group Priority

000 Reserved

001 C > A > B

010 A > B > C

011 A > C > B

100 B > C > A

101 C > B > A

110 B > A > C

111 Reserved

IRQ3, IRQ5 Priority (Group A)

0 IRQ5 > IRQ3

1 IRQ3 > IRQ5

IRQ0, IRQ2 Priority (Group B)

0 IRQ2 > IRQ0

1 IRQ0 > IRQ2

IRQ1, IRQ4 Priority (Group C)

0 IRQ1 > IRQ4

1 IRQ4 > IRQ1

Reserved (Must be 0.)

R249 IPR

D3 D2

IRQ0 = P32 Input

↓

IRQ1 = P33 Input

↓

IRQ2 = P31 Input

↓

IRQ3 = P32 Input

↑

IRQ4 = T0

IRQ5 = T1

Reserved (Must be 0.)

R250 IRQ

Figure 27. Interrupt Mask Register (FB

H: Read/Write)

Figure 28. Flag Register (FC

H: Read/Write)

Figure 29. Register Pointer (FD

H: Read/Write)

Figure 30. Stack Pointer (FF

H: Read/Write)

Reserved (Must be 0.)

1 Enables IRQ5-IRQ0

= IRQ0)

1 Enables Interrupts

R251 IMR

D7 D6

D4 D3

D2 D1

User Flag F1

User Flag F2

Half Carry Flag

Decimal Adjust Flag

Overflow Flag

Sign Flag

Zero Flag

Carry Flag

R252 Flags

Reserved (Must be 0.)

R253 RP

Stack Pointer Lower

Byte (SP

- SP

)

R255 SPL

Z86C08 Datasheet(PDF) 29 Page - Zilog, Inc.

Z86C08 Datasheet(HTML) 29 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

Datasheet Download

Link URL