AS8267 datasheet(98/136 Pages) AMSCO

Part #	AS8267

Description	Single-Phase 2-Current Energy Measurement Integrated Circuits with Microcontroller, RTC, Programmable Multi-Purpose I/Os

PDF	136 Pages

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Manufacturer	AMSCO [ams AG]

Direct Link	http://www.ams.com

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98 / 136 page

Data Sheet AS8267 / AS8268

Revision 1.0, 19-Jun-07

Page 98 of 136

Memory Maps

The 8051 MCU is configured as Von Neumann architecture merging program and data range into one 64kB

address space. This space is completely accessible via MOVX and partly accessible via MOVC (0000h –

5FFFh). Besides, there is the typical 8051 structure with 128 bytes of internal memory (I_RAM) and the special

function registers (SFRs) also in a 128 byte address space.

SFRs

Direct addressing

FFh

80h

128 bytes

I_RAM

7Fh

00h

Internal Memory

unused

FFFFh

C000h

XDATA

Memory

Special

Function

Registers

unused

A000h

1kB X_RAM

32kB

FLASH

7FFFh

0000h

9000h

8000h

unused

9FFFh

MPIO

LCDD

DSP

SPI

RTC

SCT

9500h

9400h

9300h

9200h

9100h

9000h

Direct addressing

addressing

MOVX A, @DPTR

(4 banks)

MOVX @DPTR, A

Bit addressing

MOVC A, @A+PC

MOVC A, @A+DPTR

} only for 0000h – 7FFFh

MOVX @Ri, A

MOVXA, @Ri with Ri

ε {R0, R1},

P2 represents upper address bits

FLASH Memory

The Flash memory shares address and output data lines with the X_RAM. 32kB out of 64kB addressable

memory are used: 0000h – 7FFFh for program data storage.

AS8267 Datasheet(PDF) 98 Page - ams AG

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