SC1200 datasheet(44/60 Pages) TI

44 / 60 page

MSC1200

SBAS289E

www.ti.com

Port 3 Data Direction High Register (P3DDRH)

Reset Value

SFR B4H

P37H

P37L

P36H

P36L

P35H

P35L

P34H

P34L

00H

P3.7

Port 3 bit 7 control.

bits 7-6

P3.6

Port 3 bit 6 control.

bits 5-4

P3.5

Port 3 bit 5 control.

bits 3-2

P3.4

Port 3 bit 4 control.

bits 1-0

P36H

P36L

Standard 8051

CMOS Output

Open Drain Output

Input

P35H

P35L

Standard 8051

CMOS Output

Open Drain Output

Input

P34H

P34L

Standard 8051

CMOS Output

Open Drain Output

Input

P37H

P37L

Standard 8051

CMOS Output

Open Drain Output

Input

Reset Value

SFR B5H

00H

NOTE: Port 3.7 also controlled by EA and Memory Access Control HCR1.1.

NOTE: Port 3.6 also controlled by EA and Memory Access Control HCR1.1.

IDAC Register

IDAC

IDAC Register.

bits 7-0

IDACOUT = IDAC • 3.8µA (~1mA full-scale). Setting (PDCON.PDIDAC) will shut down IDAC and float the IDAC pin.

Interrupt Priority (IP)

PS0

Serial Port 0 Interrupt. This bit controls the priority of the serial Port 0 interrupt.

bit 4

0 = Serial Port 0 priority is determined by the natural priority order.

1 = Serial Port 0 is a high priority interrupt.

PT1

Timer 1 Interrupt. This bit controls the priority of the Timer 1 interrupt.

bit 3

0 = Timer 1 priority is determined by the natural priority order.

1 = Timer 1 priority is a high priority interrupt.

PX1

External Interrupt 1. This bit controls the priority of external interrupt 1.

bit 2

0 = External interrupt 1 priority is determined by the natural priority order.

1 = External interrupt 1 is a high priority interrupt.

PT0

Timer 0 Interrupt. This bit controls the priority of the Timer 0 interrupt.

bit 1

0 = Timer 0 priority is determined by the natural priority order.

1 = Timer 0 priority is a high priority interrupt.

PX0

External Interrupt 0. This bit controls the priority of external interrupt 0.

bit 0

0 = External interrupt 0 priority is determined by the natural priority order.

1 = External interrupt 0 is a high priority interrupt.

Reset Value

SFR B8H

PS0

PT1

PX1

PT0

PX0

80H

SC1200 Datenblatt(PDF) 44 Page - Texas Instruments

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