ST72321AR9-Auto STMicroelectronics, ST72321AR9-Auto Datasheet - Page 237

• Manufacturer Part Number: ST72321AR9-Auto
• Description: 8-bit MCU for automotive with 60 Kbyte Flash, 10-bit ADC, timers, SPI, SCI and I2C interfaces
• Manufacturer: STMicroelectronics

Specifications of ST72321AR9-Auto

• Hdflash Endurance: 100 cycles, data retention 20 years
• Clock Sources: crystal/ceramic resonator oscillators, internal RC oscillator and bypass for external clock
• 4 Power Saving Modes: Halt, Active Halt, Wait and Slow

ST72321xx-Auto
Known limitations
; check for falling edge
cp A,#$02
jrne OUT
TNZ Y
jrne OUT
LD A,#$01
LD sema,A
; set the semaphore to '1' if edge is detected
RIM
; reset the interrupt mask
LD A,sema
; check the semaphore status
CP A,#$01
jrne OUT
call call_routine
; call the interrupt routine
RIM
OUT:
RIM
JP while_loop
.call_routine
; entry to call_routine
PUSH A
PUSH X
PUSH CC
.ext1_rt
; entry to interrupt routine
LD A,#$00
LD sema,A
IRET
Doc ID 13829 Rev 1
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