Z86E61 Datasheet, PDF (33/44 Pages) Zilog, Inc. – CMOS Z8 16K/32K EPROM MICROCONTROLLER

PRELIMINARY
Z86E61/E63 Z8^® MCU
WITH 16K/32K EPROM
R250 IRQ
D7 D6 D5 D4 D3 D2 D1 D0
IRQ0 = P32 Input (D0 = IRQ0)
IRQ1 = P33 Input
IRQ2 = P31 Input
IRQ3 = P30 Input, Serial Input
IRQ4 = T0 Serial Output
IRQ5 = T1
Reserved (Must be 0)
Figure 38. Interrupt Request Register
(FA : Read/Write)
H
R253 RP
D7 D6 D5 D4 D3 D2 D1 D0
0 Reserved (Must be 0)
r4
r5
Register Pointer
r6
r7
Figure 41. Register Pointer Register
(FD_H: Read/Write)
R251 IMR
D7 D6 D5 D4 D3 D2 D1 D0
1 Enables IRQ5-IRQ0
(D0 = IRQ0)
1 Enables RAM Protect
1 Enables Interrupts
Figure 39. Interrupt Mask Register
(FB : Read/Write)
H
R252 FLAGS
D7 D6 D5 D4 D3 D2 D1 D0
User Flag F1
User Flag F2
Half Carry Flag
Decimal Adjust Flag
Overflow Flag
Sign Flag
Zero Flag
Carry Flag
R254 SPH
D7 D6 D5 D4 D3 D2 D1 D0
Stack Pointer Upper
Byte (SP15 - SP8)
Figure 42. Stack Pointer Register
(FE : Read/Write)
H
R255 SPL
D7 D6 D5 D4 D3 D2 D1 D0
Stack Pointer Lower
Byte (SP7 - SP0)
Figure 43. Stack Pointer Register
(FF : Read/Write)
H
Figure 40. Flag Register
(FC_H: Read/Write)
33