SAN3010
PAGE
3
LOC OBJ
4029 F590
402B 7991
402D D9FE
402F
4030
4032
4033
00
7480
4E
F590
4035
4037
4039
403B
7992
D9FE
7488
F590
403D 7991
403F D9FE
4041
4042
4044
4045
00
7490
4F
F590
4047
4049
404B
404D
7930
D9FE
7488
F590
404F 0B
4050 BB09C1
4053 7900
4055 7A1C
LINE
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SOURCE
mov
P1,A
; 1 cycle
;--------------------------------------------------------------
;-- Delay 3:wait 321 us = 295 machine cycles and force RowY low
delay3: mov
R1,#145
; 1 cycle
djnz
R1,$
; 2 cycles;#Loops=(295-5)/2=145
SCAN2:
NOP
mov
orl
mov
;
;
;
;
1
1
1
1
cycle
cycle
cycle
cycle
A,#ForceLO
A,R6
P1,A
;--------------------------------------------------------------
;Delay 4: wait 321us= 295 machine cycles +disable all rows/cols
delay4: mov
R1,#146
; 1 cycle
djnz
R1,$
; 2 cycles;#Loops=(295-3)/2=146
mov
A,#Disable
; 1 cycle
mov
P1,A
; 1 cycle
;--------------------------------------------------------------
;--- Delay 5:wait 321 us = 295 machine cycles + force ColX high
delay5: mov
R1,#145
; 1 cycle
djnz
R1,$
; 2 cycles;#Loops=(295-5)/2=145
SCAN3:
NOP
; 1 cycle
mov
A,#ForceHi
; 1 cycle
orl
A,R7
; 1 cycle
mov
P1,A
; 1 cycle
;--------------------------------------------------------------
;Delay 6:wait 107.25us=99 machine cycles +disable all rows/cols
delay6: mov
R1,#48
; 1 cycle
djnz
R1,$
; 2 cycles;#Loops=(99-3)/2 = 48
mov
A,#Disable
; 1 cycle
mov
P1,A
; 1 cycle
;--------------------------------------------------------------
inc
R3
; increment loop counter
cjne
R3,#9,Sync
; repeat loop 9 times
;----- Delay 7: wait >15444 us = 14233 machine cycles before
;-----
next key entry
;----- Remark: when cascading memory keys (M1...M10, Mem)
;----- dialling of a subsequent stored number is only accepted
;----- when the previous number has been fully dialled out.
;----- Example1: key entry is "M1","M2"
;-----
M2 is only detected when M1 has completed dialing
;-----
its stored number, a delay has to be added between
;-----
key entries
;----- Example2: key entry is "M1","0"
;----
numbers are stored in FIFO ,so they can be entered
;-----
immediately after a Memory entry, no additional
;-----
delay necessary
delay7: mov
R1,#0
;
mov
R2,#28
9/13
sames
SAMES [ SAMES ]
