HT46C48AE Просмотр технического описания (PDF) - Holtek Semiconductor
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HT46C48AE Datasheet PDF : 73 Pages
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H T46R 46E
00H
IA R
01H
MP
02H
03H
04H
05H
ACC
06H
PCL
07H
TB LP
08H
TB LH
09H
0A H S TA TU S
0B H
IN T C
0C H
0D H
TM R
0E H
TM R C
0FH
10H
11H
12H
PA
13H
PAC
14H
PB
15H
PBC
16H
17H
18H
PD
19H
PDC
1A H
PW M
1B H
1C H
1D H
1E H
1FH
20H
21H
ADR
22H
ADCR
23H
ACSR
HT46R46E/C46E/R47E/C47E/R48AE/C48AE/R49E
H T46R 47E
IA R
MP
H T46R 48A E
IA R
MP
H T46R 49E
IA R
MP
ACC
PCL
TB LP
TB LH
STATU S
IN T C
TM R
TM R C
ACC
PCL
TB LP
TB LH
STATU S
IN T C
TM R
TM R C
ACC
PCL
TB LP
TB LH
STATU S
IN T C
TM R
TM R C
PA
PA
PA
PAC
PAC
PAC
PB
PB
PB
PBC
PBC
PBC
PC
PC
PCC
PCC
PD
PD
PD
PDC
PDC
PDC
PW M
PW M
PW M 0
PW M 1
ADRL
ADRH
ADCR
ACSR
ADRL
ADRH
ADCR
ACSR
ADRL
ADRH
ADCR
ACSR
Special Purpose Data Memory
: U n u s e d , re a d a s "0 0 "
The following example shows how to clear a section of four RAM locations already defined as locations adres1 to
adres4.
data .section ¢data¢
adres1
db ?
adres2
db ?
adres3
db ?
adres4
db ?
block
db ?
code .section at 0 ¢code¢
org 00h
start:
mov a,04h
; setup size of block
mov block,a
mov a,offset adres1 ; Accumulator loaded with first RAM address
mov mp,a
; setup memory pointer with first RAM address
loop:
clr IAR
inc mp
sdz block
jmp loop
; clear the data at address defined by MP
; increment memory pointer
; check if last memory location has been cleared
continue:
The important point to note here is that in the example shown above, no reference is made to specific RAM addresses.
Rev. 1.20
14
August 15, 2007
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