UPSD3214A-24U1(2009) View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

UPSD3214A-24U1
(Rev.:2009)

Flash programmable system devices with 8032 MCU and USB and programmable logic

STMicroelectronics 

Interrupt system

Figure 15. Interrupt system

Interrupt

IE /

Sources

INT0

USART

Timer

0

I2C

INT1

UPSD3212A, UPSD3212C, UPSD3212CV

IP / IPA Priority

High

Low

Timer

1

USB

2nd

USART

Timer

2

Global

Enable

AI07427b

Table 18. SFR register description

SFR

Add

r

Reg

Name

7

Bit Register Name

6

5

4

3

2

A7 IEA

—

—

—

ES2

—

—

A8 IE

EA

B7 IPA

—

—

ET2 ES

ET1 EX1

—

—

PS2

—

—

B8 IP

—

—

PT2 PS

PT1 PX1

1

EI2C

ET0

PI2C

PT0

Rese

0

t

Valu

Comments

e

Interrupt

EUSB 00 Enable

(2nd)

EX0

00

Interrupt

Enable

Interrupt

PUSB 00 Priority

(2nd)

PX0

00

Interrupt

Priority

5.8

Interrupt priority structure

Each interrupt source can be assigned one of two priority levels. Interrupt priority levels are

defined by the interrupt priority special function register IP and IPA.

0 = low priority

1 = high priority

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