SAA5290 Ver la hoja de datos (PDF) - Philips Electronics

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SAA5290

One page Economy Teletext/TV microcontroller

Philips Electronics 

Philips Semiconductors

One page Economy Teletext/TV

microcontroller

Preliminary specification

SAA5290

Table 11 SFR description

REGISTER

FUNCTION

IE - Interrupt Enable

EA

Disable all interrupts (logic 0) or use individual enable bits (logic 1).

ES1

I2C-bus interrupt enable (logic 1).

ET1

Enable Timer 1 overflow interrupt (logic 1).

EX1

Enable external interrupt 1 (logic 1).

ET0

Enable Timer 0 overflow interrupt (logic 1).

EX0

Enable external interrupt 0 (logic 1).

PCON - Power Control

GF0

General purpose flag bit 0.

GF1

General purpose flag bit 1.

PWM0 to PWM5 - 6-bit Pulse Width Modulator control registers

PWE

PV0 to PV5

Activate this 6-bit PWM and take over port pin (logic 1).

Value to output by this 6-bit PWM.

SAD - Software ADC control

VHI

CH0 and CH1

ST

SAD0 to SAD3

Analog input voltage greater than DAC output voltage (logic 1).

See Table 12.

Initiate voltage comparison (logic 1). This is automatically reset.

4-bit DAC input value. The DAC output of this value is compared with analog input voltage.

S1BIT - Serial I2C-bus data (READ)

SDI

I2C-bus data bit latched-in from SDA on the last rising edge of SCL.

S1BIT - Serial I2C-bus data (WRITE)

SDO

I2C-bus data bit output.

S1INT - Serial I2C-bus interrupt

SI

I2C-bus interrupt flag.

S1SCS - Serial I2C-bus control (READ)

SDI

SCI

CLH

BB

RBF

WBF

STR

ENS

Serial data input at SDA.

Serial clock input at SCL.

Clock LOW-to-HIGH transition flag.

Bus busy flag.

Read bit finished flag.

Write bit finished flag.

Clock stretching enable (logic 1).

Enable serial I/O (logic 1).

February 1995

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