Z86C34 datasheet(61/70 Pages) ZILOG

61 / 70 page

Z86C34/C35/C36/C44/C45/C46

ZiLOG

CMOS Z8® MCUs with ASCI UART

DS007601-Z8X0499

P R E L I M I N A R Y

Z8 CONTROL REGISTERS

Figure 40. Port Conﬁguration Register (PCON)

(WRITE ONLY)

Figure 41. Timer Mode Register

(F1H: READ/WRITE)

0 Port 0 Open Drain

1 Port 0 Push-pull Active*

PCON (FH) 00H

Comparator Output Port 3

0 P34, P37 Standard Output*

1 P34, P37 Comparator Output

0 Port 0 Low EMI

1 Port 0 Standard*

0 Port 2 Low EMI

1 Port 2 Standard*

Low EMI Oscillator

0 Low EMI

1 Standard*

0 Port 3 Low EMI

1 Port 3 Standard*

*Default Setting After Reset

Must be set to one for devices

in 28-pin packages

0 Port 1 Open Drain

1 Port 1 Push-pull Active*†

0 Port 1 Low EMI

1 Port 1 Standard*

†

0 Disable T0 Count

1 Enable T0 Count

0 No Function

1 Load T0

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

R241 TMR

Figure 42. Counter/Timer 1 Register

(F2H: READ/WRITE)

Figure 43. Prescaler 1 Register

(F3H: WRITE ONLY)

Figure 44. Counter/Timer 0 Register

(F4H: READ/WRITE)

T Initial Value

(When Written)

(Range: 1-256 Decimal

01-00 HEX)

T Current Value

(When Read)

R242 T1

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)

R243 PRE1

T0 Initial Value

(When Written)

(Range: 1-256 Decimal

01-00 HEX)

T0 Current Value

(When Read)

R244 T0

Z86C34 Datasheet(PDF) 61 Page - Zilog, Inc.

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