Philips 8-bit microcontroller with two-clock 80C51 core UM10109 Manual De Usuario

 

© Koninklijke Philips Electronics N.V. 2005. All rights reserved.

The various P89LPC932A1 memory spaces are as follows:

DATA — 128 bytes of internal data memory space (00h:7Fh) accessed via direct or 
indirect addressing, using instruction other than MOVX and MOVC. All or part of the Stack 
may be in this area.

IDATA — Indirect Data. 256 bytes of internal data memory space (00h:FFh) accessed via 
indirect addressing using instructions other than MOVX and MOVC. All or part of the 
Stack may be in this area. This area includes the DATA area and the 128 bytes 
immediately above it.

SFR — Special Function Registers. Selected CPU registers and peripheral control and 
status registers, accessible only via direct addressing.

CODE — 64 kB of Code memory space, accessed as part of program execution and via 
the MOVC instruction. The P89LPC932A1 has 8 kB of on-chip Code memory.

002aaa948

0000h

03FFh

0400h

07FFh

0800h

0BFFh

0C00h

0FFFh

SECTOR 0

SECTOR 1

SECTOR 2

SECTOR 3

1000h

13FFh

1400h

17FFh

1800h

1BFFh

1C00h

1E00h

1FFFh

SECTOR 4

SECTOR 5

SECTOR 6

FFEFh

FF00h

IAP entry-

points

SECTOR 7

ISP CODE

(512B)*

SPECIAL FUNCTION

REGISTERS

(DIRECTLY ADDRESSABLE)

128 BYTES ON-CHIP

DATA MEMORY (STACK,

DIRECT AND INDIR. ADDR.)

4 REG. BANKS R[7:0]

data memory

(DATA, IDATA)

128 BYTES ON-CHIP

DATA MEMORY (STACK

 AND INDIR. ADDR.)

IDATA (incl. DATA)

FFEFh

FF1Fh

FF00h

entry points for:
-51 ASM. code
-C code

1FFFh

1E00h

entry points for:
-UART (auto-baud)
-I2C, SPI, etc.*

flexible choices:
-as supplied (UART)
-Philips libraries*
-user-defined

entry
points

read-protected

IAP calls only

DATA

Directly and indirectly addressable memory

128

IDATA

Indirectly addressable memory

256