st2032b Sitronix Technology Corporation, st2032b Datasheet - Page 37
st2032b
Manufacturer Part Number
st2032b
Description
8 Bit Microcontroller With 32k Bytes Rom
Manufacturer
Sitronix Technology Corporation
Datasheet
1.ST2032B.pdf
(53 pages)
- Current page: 37 of 53
- Download datasheet (754Kb)
Interrupt-Subroutine
Port_ISR
?Scan_PB
Ver 2.4
PHA
PHX
LDX
LDA
STA
STA
STZ
nop
nop
nop
LDA
STX
JSR
SEC
ROL
LDA
BCS
.
.
PLX
PLA
RTI
#00010111B
#11111110B
<ScanValue
<PB
<LSEL
<PA
<LSEL
Store-Key-Data
<Scanvalue
<ScanValue
?Scan_PB
;;X: Value for LSEL when activate segments
;;Shift working zero to left
;;Set Working zero for Port-B
;;Disable segment waveforms
;;Wait for return line to be stable
;;Enable segment waveforms
;;Keep on scanning until ScanValue = FF
37/53
FIGURE 14-6 Port Interrupt Flow Chart
No
Wait Port-A to be Stable
Output Scan Value on
Turn OFF Port-B
End of Scanning?
Turn ON Port-B
Store Key Data
Read Port-A
Scan Lines
RTI
Yes
ST2032B
9/12/07
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