st92f124 STMicroelectronics, st92f124 Datasheet - Page 179

• Manufacturer Part Number: st92f124
• Description: 8/16-bit Single Voltage Flash Mcu Family With Ram, E3 Tmemulated Eeprom, Can 2.0b And J1850 Blpd
• Manufacturer: STMicroelectronics

EXTENDED FUNCTION TIMER (Cont’d)
Note: A single access (read/write) to the SR regis-
ter at the beginning of the interrupt routine is the
first step needed to clear all the EFT interrupt
flags. In a second step, the lower bytes of the data
; INTERRUPT ROUTINE EXAMPLE
L6:
L2:
L3:
L4:
L5:
L7:
iret
push R234
spp #28
cp R254,#0
jxz L7
tm R254,#128
jxz L2
ld r1,R241
; Insert your code here
tm R254,#16
jxz L3
ld r1,R243
; Insert your code here
tm R254,#64
jxz L4
ld r1,R249
; Insert your code here
tm R254,#8
jxz L5
ld r1,R251
; Insert your code here
tm R254,#32
jxz L6
ld r1,R245
; Insert your code here
jx L6
pop R234
; Check Input Capture 2 flag
; Check Input Compare 1 flag
; Check Input Compare 2 flag
; Save current page
; Set EFT page
; while E0_SR is not cleared
; Check Input Capture 1 flag
; else go to next test
; Dummy read to clear IC1LR
; else go to next test
; Dummy read to clear IC2LR
; else go to next test
; Dummy read to clear OC1LR
; else go to next test
; Dummy read to clear OC1LR
; Check Input Overflow flag
; else go to next test
; Dummy read to clear Overflow flag
; Restore current page
registers must be accessed if the corresponding
flag is set. It is not necessary to access the SR
register between these instructions, but it can
done.
EXTENDED FUNCTION TIMER (EFT)
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