UPSD3233 datasheet(36/170 Pages) STMICROELECTRONICS

Part #	UPSD3233

Description	Flash Programmable System Devices with 8032 Microcontroller Core

PDF	170 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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36 / 170 page

uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

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USART Interrupt

–

The USART Interrupt is generated by RI

(receive interrupt) OR TI (transmit interrupt).

–

When the USART Interrupt is generated, the

corresponding request flag must be cleared by

software. The interrupt service routine will

have to check the various USART registers to

determine the source and clear the

corresponding flag.

–

Both USART’s are identical, except for the

additional interrupt controls in the Bit 4 of the

additional interrupt control registers (A7H,

B7H)

Figure 16. Interrupt System

Table 18. SFR Register

SFR

Addr

Reg

Name

Bit Register Name

Reset

Value

Comments

IEA

EDDC

—

ES2

—

EI2C

EUSB

Interrupt

Enable (2nd)

—

ET2

ET1

EX1

ET0

EX0

Interrupt

Enable

IPA

PDDC

—

PS2

—

PI2C

PUSB

Interrupt

Priority (2nd)

—

PT2

PT1

PX1

PT0

PX0

Interrupt

Priority

AI06646

INT0

USART

Timer

I2C

INT1

DDC

Timer

USB

2nd

USART

Timer

High

Low

Interrupt

Sources

IE /

IP / IPA Priority

Global

Enable

UPSD3233 Datasheet(PDF) 36 Page - STMicroelectronics

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