Z86L70 Datasheet, PDF (58/61 Pages) Zilog, Inc. – IR/Low-Voltage Microcontroller

Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
R250 IRQ
D7 D6 D5 D4 D3 D2 D1 D0
Default Setting After Reset = 0000 0000
IRQ0 = P32 Input
IRQ1 = P33 Input
IRQ2 = P31 Input
IRQ3 = T16_OUT
IRQ4 = T8_OUT
Reserved (Must be 0)
Inter Edge
P31 ↓ P32 ↓ = 00
P31 ↓ P32 ↑ = 01
P31 ↑ P32 ↓ = 10
P31 ↑↓ P32 ↑↓ = 11
Figure 51. Interrupt Request Register
((0) FAH: Read/Write)
R251 IMR
D7 D6 D5 D4 D3 D2 D1 D0
* Default Setting After Reset
1 Enables IRQ4-IRQ0
(D0 = IRQ0)
Reserved (Must be 0)
Reserved (Must be 0)
0 Master Interrupt Disable*
1 Master Interrupt Enable
Figure 52. Interrupt Mask Register
((0) FBH: Read/Write)
R252 FLAGS
D7 D6 D5 D4 D3 D2 D1 D0
User Flag F1
User Flag F2
Half Carry Flag
Decimal Adjust Flag
Overflow Tag
Sign Flag
Zero Flag
Carry Flag
Figure 53. Flag Register
((0) FCH: Read/Write)
Zilog
R253 RP
D7 D6 D5 D4 D3 D2 D1 D0
Default Setting After
Reset = 0000 0000
Expanded Register
Pointer
Working Register
Pointer
Figure 54. Register Pointer
((0) FDH: Read/Write)
R254 SPH
D7 D6 D5 D4 D3 D2 D1 D0
Stack Pointer Upper
Byte (SP15-SP8)
Figure 55. Stack Pointer High
((0) FEH: Read/Write)
R255 SPL
D7 D6 D5 D4 D3 D2 D1 D0
Stack Pointer Lower
Byte (SP7-SP0)
Figure 56. Stack Pointer Low
((0) FFH: Read/Write)
1-58
PRELIMINARY
DS97LVO0500