ST52T400 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST52T400

8-BIT INTELLIGENT CONTROLLER UNIT (ICU) Timer/PWM, Analog Comparator, Triac/PWM Timer, WDG

STMicroelectronics 

Figure 5.4 HALT Flow Chart

ST52T400/T440/E440/T441

HALT INSTRUCTION

YES

HALT INSTRUCTION

SKIPPED

WATCHDOG

ENABLED

NO

OSCILLATOR

PERIPHERALS CLOCK

CPU CLOCK

OFF

OFF

OFF

NO

RESET

YES

NO

EXTERNAL

YES

INTERRUPT

OSCILLATOR

ON

PERIPHERALS CLOCK

ON

CPU CLOCK

ON

OSCILLATOR

ON

PERIPHERALS CLOCK

ON

CPU CLOCK

ON

1000000 CPU CLOCK

CYCLES DELAY

RESET CPU

AND RESTART

USER PROGRAM

4096 CPU CLOCK

CYCLES DELAY

NO

EXTERNAL

YES

INTERRUPT

ENABLED

RESTART PROGRAM

SERVICING THE

LOWER PRIORITY

INTERRUPT ROUTINE

RESTART PROGRAM

SERVICING THE

EXTERNAL

INTERRUPT ROUTINE

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