z90102 ZiLOG Semiconductor, z90102 Datasheet - Page 33

• Manufacturer Part Number: z90102
• Description: 40-pin Low-cost Digital Television Controller
• Manufacturer: ZiLOG Semiconductor

Zilog
DS97TEL1902
R250 IRQ
Reset Condition = 00H
R252 FLAGS
R251 IMR
* Default after Reset
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 62. Interrupt Request Register
Figure 63. Interrupt Mask Register
Figure 64. Flag Register
(FAH: Read/Write)
(FBH: Read/Write)
(FCH: Read/Write)
FBH
FAH
FCH
1 - Enables IRQ5 - IR0
(D0 - IRQ0)
Reserved (Must be 0)
1 - Enables Interrupts
0* Disable Interrupts
IRQ - Software only
IRQ1 - VSYNC
IRQ2 - P31 Input
IRQ3 - P30 Input
IRQ4 - T0
IRQ5 - T1
Reserved (Must be 0)
User Flag F1
User Flag F2
Half Carry Flag
Decimal Adjust Flag
Overflow Flag
Sign Flag
Zero Flag
Carry Flag
R253 RP
Reset Condition = 00H
Reset Condition = Undefined
R254 GP
D7 D6 D5 D4 D3 D2 D1 D0
R255 SPL
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
40-Pin Low-Cost Digital Television Controller
Figure 66. General-Purpose
Figure 65. Register Pointer
Figure 67. Stack Pointer
(FDH: Read/Write)
(FEH: Read/Write)
(FFH: Read/Write)
FDH
FFH
FEH
Z90102/90103/90104
Reserved (Must be 0)
Register Pointer
Stack Pointer Upper
Byte (SP7-SP0)
0 = Level 0
1 = Level 1
33
1