Z86C04 Datasheet, PDF (28/34 Pages) Zilog, Inc. – CMOS 8-BIT LOW-COST 1K/2K-ROM MICROCONTROLLERS

Z86C04/C08
CMOS 8-Bit Low-Cost 1K/2K-ROM Microcontrollers
Z8^® CONTROL REGISTER DIAGRAMS
Zilog
R241 TMR
D7 D6 D5 D4 D3 D2 D1 D0
0 No Function
1 Load T0
0 Disable T _0Count
1 Enable T ₀ Count
0 No Function
1 Load T ₁
0 Disable T _1Count
1 Enable T ₁ Count
T _IN Modes
00 External Clock Input
01 Gate Input
10 Trigger Input
(Non-retriggerable)
11 Trigger Input
(Retriggerable)
Reserved (Must be 0.)
Figure 17. Timer Mode Register (F1_H: Read/Write)
R244 T0
D7 D6 D5 D4 D3 D2 D1 D0
T0 Initial Value
(When Written)
(Range: 1-256 Decimal
01-00 HEX)
T0 Current Value
(When READ)
Figure 20. Counter/Timer 0 Register (F4_H:Read/Write)
R245 PRE0
D7 D6 D5 D4 D3 D2 D1 D0
Count Mode
0 T₀ Single Pass
1 T₀ Modulo-n
Reserved (Must be 0.)
Prescaler Modulo
(Range: 1-64 Decimal
01-00 Hex)
R242 T1
D7 D6 D5 D4 D3 D2 D1 D0
T1 Initial Value
(When Written)
(Range 1-256 Decimal
01-00 HEX)
T1 Current Value
(When READ)
Figure 18. Counter Time 1 Register (F2_H: Read/Write)
R243 PRE1
D7 D6 D5 D4 D3 D2 D1 D0
Count Mode
0 T ₁ Single Pass
1 T ₁ Modulo
Clock Source
1 T _1Internal
0 T _1External Timing Input
(T _IN) Mode
Prescaler Modulo
(Range: 1-64 Decimal
01-00 HEX)
Figure 19. Prescaler 1 Register (F3_H: Write Only)
Figure 21. Prescaler 0 Register (F5_H: Write Only)
R246 P2M
D7 D6 D5 D4 D3 D2 D1 D0
P2 ₇ - P20 I/O Definition
0 Defines Bit as OUTPUT
1 Defines Bit as INPUT
Figure 22. Port 2 Mode Register (F6_H: Write Only)
R247 P3M
D7 D6 D5 D4 D3 D2 D1 D0
0 Port 2 Open-Drain
1 Port 2 Push-Pull Active
Port 3 Inputs
0 Digital
1 Analog
Reserved (Must be 0.)
Figure 23. Port 3 Mode Register (F7_H: Write Only)
28
PRELIMINARY
DS97DZ80502