Z86E04 Datasheet, PDF (42/44 Pages) Zilog, Inc. – CMOS Z8 OTP MICROCONTROLLERS

Z86E04/E08
CMOS Z8 OTP Microcontrollers
Z8 CONTROL REGISTERS (Continued)
Zilog
R248 P01M
D7 D6 D5 D4 D3 D2 D1 D0
P0₂-P0₀ Mode
00 = Output
01 = Input
Reserved (Must be 1.)
Reserved (Must be 0.)
Figure 31. Port 0 and 1 Mode Register
(F8_H: Write Only)
R249 IPR
D7 D6 D5 D4 D3 D2 D1 D0
Interrupt Group Priority
Reserved = 000
C > A > B = 001
A > B > C = 010
A > C > B = 011
B > C > A= 100
C > B > A= 101
B > A > C = 110
Reserved = 111
IRQ1, IRQ4 Priority (Group C)
0 = IRQ1 > IRQ4
1 = IRQ4 > IRQ1
IRQ0, IRQ2 Priority (Group B)
0 = IRQ2 > IRQ0
1 = IRQ0 > IRQ2
IRQ3, IRQ5 Priority (Group A)
0 = IRQ5 > IRQ3
1 = IRQ3 > IRQ5
Reserved (Must be 0.)
Figure 32. Interrupt Priority Register
(F9_H: Write Only)
R250 IRQ
D7 D6 D5 D4 D3 D2 D1 D0
IRQ0 = P32 Input
IRQ1 = P33 Input
IRQ2 = P31 Input
IRQ3 = P32 Input
IRQ4 = T0
IRQ5 = T1
Reserved (Must be 0)
Figure 33. Interrupt Request Register
(FA_H: Read/Write)
R251 IMR
D7 D6 D5 D4 D3 D2 D1 D0
1 Enables IRQ0-IRQ5
(D0 = IRQ0)
Reserved (Must be 0.)
1 Enables Interrupts
Figure 34. Interrupt Mask Register
(FB_H: 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 Flag
Sign Flag
Zero Flag
Carry Flag
Figure 35. Flag Register
(FC_H: Read/Write)
R253 RP
D7 D6 D5 D4 D3 D2 D1 D0
Default After Reset = 00H
Expanded Register File
Working Register Pointer
Figure 36. Register Pointer
(FD_H: Read/Write)
R255 SPL
D7 D6 D5 D4 D3 D2 D1 D0
Stack Pointer Lower
Byte (SP ₇ - SP ₀ )
Figure 37. Stack Pointer
(FF_H: Read/Write)
42
PRELIMINARY
DS97Z8X1104