Z86C34 Datasheet, PDF (61/70 Pages) Zilog, Inc. – CMOS Z8 MCUs WITH ASCI UART OFFER EFFICIENT, COST-EFFECTIVE DESIGN FLEXIBILITY

ZiLOG
Z8 CONTROL REGISTERS
PCON (FH) 00H
D7 D6 D5 D4 D3 D2 D1 D0
*Default Setting After Reset
† _{Must be set to one for devices}
in 28-pin packages
Comparator Output Port 3
0 P34, P37 Standard Output*
1 P34, P37 Comparator Output
0 Port 1 Open Drain
1 Port 1 Push-pull Active*^†
0 Port 0 Open Drain
1 Port 0 Push-pull Active*
0 Port 0 Low EMI
1 Port 0 Standard*^†
0 Port 1 Low EMI
1 Port 1 Standard*
0 Port 2 Low EMI
1 Port 2 Standard*
0 Port 3 Low EMI
1 Port 3 Standard*
Low EMI Oscillator
0 Low EMI
1 Standard*
Figure 40. Port Configuration Register (PCON)
(WRITE ONLY)
R241 TMR
D7 D6 D5 D4 D3 D2 D1 D0
0 No Function
1 Load T0
0 Disable T0 Count
1 Enable T0 Count
0 No Function
1 Load T1
0 Disable T1 Count
1 Enable T1 Count
TIN Modes
00 External Clock Input
01 Gate Input
10 Trigger Input
(Non-retriggerable)
11 Trigger Input
(Retriggerable)
TOUT Modes
00 Not Used
01 T0 Out
10 T1 Out
11 Internal Clock Out
Figure 41. Timer Mode Register
(F1_H: READ/WRITE)
Z86C34/C35/C36/C44/C45/C46
CMOS Z8® MCUs with ASCI UART
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 42. Counter/Timer 1 Register
(F2_H: READ/WRITE)
R243 PRE1
D7 D6 D5 D4 D3 D2 D1 D0
Count Mode
0 T1 Single Pass
1 T1 Modulo N
Clock Source
1 T1Internal
0 T1External Timing Input
(TIN) Mode
Prescaler Modulo
(Range: 1-64 Decimal
01-00 HEX)
Figure 43. Prescaler 1 Register
(F3_H: WRITE ONLY)
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 44. Counter/Timer 0 Register
(F4_H: READ/WRITE)
DS007601-Z8X0499
PRELIMINARY
61