SZF2002 datasheet(12/76 Pages) PHILIPS

12 / 76 page

1998 Aug 26

Philips Semiconductors

Product speciﬁcation

Low voltage 8-bit microcontroller with

6-kbyte embedded RAM

SZF2002

Table 2

Memory spaces; note 1

Notes

1. Execution from internal memory is only possible when EA = 1 during reset.

2. Page select is used to access all 8 banks in the 256-kbyte address space.

MEMORY SPACE

ADDRESS MODE

USED SIGNAL

Internal RAM 00H to 7FH

direct and indirect

−

Internal RAM 80H to FFH

indirect

−

SFRs 80H to FFH

direct

−

Internal AUX RAM (on-chip) 0000H to 17FFH

MOVX

−

External RAM (off-chip) 1800H to 7FFFH

MOVX

RAMCE, OE and WE

External ROM (off-chip) 0000H to FFFFH; note 2

program execution

CE, OE

Internal AUX RAM (on-chip) 2000H to 37FFH

program execution

−

External Flash ROM write (off-chip) 8000H to FFFFH; note 2

MOVX

CE, OE and WE

Fig.4 Memory map.

(1) Accessible via indirect addressing only.

(2) Accessible via direct and indirect addressing.

(3) Accessible via direct addressing.

(4) Gaps in the address map are undefined, and should not be used.

handbook, full pagewidth

MGM183

EXTERNAL

FLASH ROM

(BANKED)

FFFFH

8000H

EXTERNAL

ROM

BANK 0

7FFFH

0000H

EXTERNAL

RAM

INTERNAL

AUX RAM

(MOVX)

7FFFH

0000H

1800H

17FFH

INTERNAL

AUX RAM

6-KBYTE

INTERNAL

ROM

EA = 1(4)

37FFH

0000H

2000H

17FFH

EXTERNAL

FLASH ROM

(BANKED)

FFFFH

8000H

overlapped space

INTERNAL

RAM

00H

FFH

80H

SPECIAL

FUNCTION

REGISTERS

EA = 0

(1)

(2)

(3)

INTERNAL MEMORY

DATA MEMORY

PROGRAM MEMORY

,,,

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