S3P72P9 datasheet(49/225 Pages) SAMSUNG

Part #	S3P72P9

Description	SINGLE-CHIP MICROCONTROLLER HAS BEEN DESIGNED FOR HIGH PERFORMANCE USING

PDF	225 Pages

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Manufacturer	SAMSUNG [Samsung semiconductor]

Direct Link	http://www.samsung.com/Products/Semiconductor

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S3C72P9/P72P9 (Preliminary Spec)

ADDRESSING MODES

3-13

8-BIT ADDRESSING

Table 3-4. 8-Bit Direct and Indirect RAM Addressing

Instruction

Notation

Addressing Mode

Description

EMB Flag

Setting

Addressable

Area

Memory

Bank

Hardware I/O

Mapping

Direct: 8-bit address indicated

000H–07FH

Bank 0

–

by the RAM address (DA =

even number) and memory

bank selection

F80H–FFFH

Bank 15

All 8-bit

addressable

peripherals

000H–FFFH

SMB = 0, 1,

2, 3, 4, 15

(SMB = 15)

@HL

Indirect: the 8-bit address indi-

cated by the memory bank

selection and register HL; (the

4-bit L register value must be

an even number)

000H–0FFH

Bank 0

–

000H–FFFH

SMB = 0, 1,

2, 3, 4, 15

All 8-bit

addressable

peripherals

(SMB = 15)

+ PROGRAMMING TIP — 8-Bit Addressing Modes

8-Bit Direct Addressing

1. If EMB = "0":

ADATA

EQU

46H

BDATA

EQU

8EH

SMB

; Non-essential instruction, since EMB = "0"

EA,P4

; E

← (P5), A ← (P4)

SMB

ADATA,EA

; (046H)

← A, (047H) ← E

BDATA,EA

; (F8EH)

← A, (F8FH) ← E

2. If EMB = "1":

ADATA

EQU

46H

BDATA

EQU

8EH

SMB

EA,P4

; E

← (P5), A ← (P4)

SMB

ADATA,EA

; (046H)

← A, (047H) ← E

BDATA,EA

; (08EH)

← A, (08FH) ← E

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