s3c72m9 Samsung Semiconductor, Inc., s3c72m9 Datasheet - Page 49
s3c72m9
Manufacturer Part Number
s3c72m9
Description
The S3c72m5/s3c72m7/s3c72m9 Single-chip Cmos Microcontroller Has Been Designed For High Performance Using Samsung S
Manufacturer
Samsung Semiconductor, Inc.
Datasheet
1.S3C72M9.pdf
(382 pages)
- Current page: 49 of 382
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S3C72M5/C72M7/C72M9/P72M9 (Preliminary Spec)
4-BIT ADDRESSING
NOTE:
F
4-Bit Direct Addressing
1. If EMB = "0":
2. If EMB = "1":
ADATA
BDATA
ADATA
BDATA
Operand
Notation
PROGRAMMING TIP — 4-Bit Addressing Modes
@WX
@WL
@HL
DA
'x' means don't care.
EQU
EQU
SMB
LD
SMB
LD
LD
EQU
EQU
SMB
LD
SMB
LD
LD
Direct: 4-bit address indicated
by the RAM address (DA) and
the memory bank selection
Indirect: 4-bit address indicated
by the memory bank selection
and register HL
Indirect: 4-bit address indicated
by register WX
Indirect: 4-bit address indicated
by register WL
Addressing Mode
Description
46H
8EH
15
A,P3
0
ADATA,A
BDATA,A
46H
8EH
15
A,P3
0
ADATA,A
BDATA,A
Table 3-3. 4-Bit Direct and Indirect RAM Addressing
EMB Flag
Setting
; Non-essential instruction, since EMB = "0"
; A
; Non-essential instruction, since EMB = "0"
; (046H)
; (F8EH (LCON))
; A
; (046H)
; (08EH)
0
1
0
1
x
x
(P3)
(P3)
Addressable
F80H–FFFH
000H–FFFH
000H–FFFH
000H–07FH
000H–0FFH
000H–0FFH
000H–0FFH
Area
A
A
A
A
SMB = 0, 1–
SMB = 0, 1–
13, 14, 15
13, 14, 15
Memory
Bank 15
Bank 0
Bank 0
Bank 0
Bank 0
Bank
ADDRESSING MODES
addressable pe-
addressable pe-
Hardware I/O
(SMB = 15)
(SMB = 15)
Mapping
ripherals
ripherals
All 4-bit
All 4-bit
–
–
–
3-9
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