Z86L02 datasheet(34/37 Pages) ZILOG

34 / 37 page

Z86C02/E02/L02

Cost Effective, 512-Byte ROM CMOS Z8® Microcontrollers

Zilog

P R E L I M I N A R Y

DS96DZ80301

Z8 CONTROL REGISTERS (Continued)

Figure 32. Interrupt Request Register

(FAH: Read/Write)

Figure 33. Interrupt Mask Register (FBH: Read/Write)

Figure 34. Flag Register (FCH: Read/Write)

IRQ0 = P32 Input

↓

IRQ1 = P33 Input

↓

IRQ2 = P31 Input

↓

IRQ3 = P32 Input

↑

IRQ4 = Reserved

IRQ5 = T1

Reserved (Must be 0.)

R250 IRQ

Reserved (Must be 0.)

1 Enables IRQ5-IRQ0

= IRQ0)

1 Enables Interrupts

R251 IMR

User Flag F1

User Flag F2

Half Carry Flag

Decimal Adjust Flag

Overflow Flag

Sign Flag

Zero Flag

Carry Flag

R252 Flags

Figure 35. Register Pointer FDH: Read/Write)

Figure 36. Stack Pointer (FFH: Read/Write)

Reserved (Must be 0.)

R253 RP

Stack Pointer Lower

Byte (SP

- SP

)

R255 SPL

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