z89176 ZiLOG Semiconductor, z89176 Datasheet - Page 65

• Manufacturer Part Number: z89176
• Description: Voice Processing Controllers
• Manufacturer: ZiLOG Semiconductor

Zilog
DS97TAD0100
R250 IRQ
R252 FLAGS
R251 IMR
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
Figure 77. Interrupt Request Register
Figure 78. Interrupt Mask Register
Figure 79. Flag Register
(FBH: Read/Write)
(FCH: Read/Write)
(FAH: Read/Write)
IRQ0 = P32 Input
IRQ1 = P33 Input
IRQ2 = P31 Input
IRQ3 = DSP
IRQ4 = T0
IRQ5 = T1
Inter Edge
1 Enables IRQ0-IRQ5
1 Enables RAM Protect
1 Enables Interrupts
P31
P31
P31
P31
(D0 = IRQ0)
User Flag F1
User Flag F2
Half Carry Flag
Decimal Adjust Flag
Overflow Flag
Sign Flag
Zero Flag
Carry Flag
P32
P32
P32
P32
P R E L I M I N A R Y
= 00
= 01
= 10
= 11
R253 RP
R254 SPH
R255 SPL
D7 D6 D5 D4
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5
Figure 81. Stack Pointer High
Figure 82. Stack Pointer Low
Figure 80. Register Pointer
D4 D3 D2 D1
D3 D2 D1 D0
(FDH: Read/Write)
(FEH: Read/Write)
(FFH: Read/Write)
Voice Processing Controllers
D0
Expanded Register File Bank
Working Register Group
Stack Pointer Upper
Byte (SP8 - SP15)
Stack Pointer Lower
Byte (SP0 - SP7)
Z89175/Z89176
65
2