P89LPC901 View Datasheet(PDF) - Philips Electronics

Part Name

Description

Manufacturer

P89LPC901

8-bit microcontrollers with two-clock 80C51 core 1 kB 3 V Flash with 128-byte RAM

Philips Electronics 

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Table 7: P89LPC901 Special function registers

* indicates SFRs that are bit addressable.

Name

Description

SFR

addr.

MSB

Bit functions and addresses

LSB

Reset value

Hex Binary

Bit address E7

E6

E5

E4

E3

E2

E1

E0

ACC*

Accumulator

E0H

00 00000000

AUXR1 Auxiliary function register

A2H CLKLP

-

-

ENT0 SRST

0

-

DPS 00[1] 000000x0

Bit address F7

F6

F5

F4

F3

F2

F1

F0

B*

B register

F0H

00 00000000

CMP1

Comparator 1 control register ACH

-

-

CE1

-

CN1

-

CO1

CMF1 00[1] xx000000

DIVM

CPU clock divide-by-M

95H

control

00 00000000

DPTR

Data pointer (2 bytes)

DPH Data pointer HIGH

83H

00 00000000

DPL

Data pointer LOW

82H

00 00000000

FMADRH Program Flash address HIGH E7H

00 00000000

FMADRL Program Flash address LOW E6H

00 00000000

FMCON Program Flash Control

E4H BUSY

-

-

-

HVA

HVE

SV

OI 70 01110000

(Read)

Program Flash Control

(Write)

FMCMD. FMCMD. FMCMD. FMCMD. FMCMD. FMCMD. FMCMD. FMCMD.

7

6

5

4

3

2

1

0

FMDATA Program Flash data

E5H

00 00000000

IEN0*

Interrupt enable 0

A8H EA EWDRT EBO

-

ET1

-

ET0

-

00 00000000

Bit address EF

EE

ED

EC

EB

EA

E9

E8

IEN1*

Interrupt enable 1

E8H

-

-

-

-

-

EC

EKBI

-

00[1] 00x00000

Bit address BF

BE

BD

BC

BB

BA

B9

B8

IP0*

Interrupt priority 0

B8H

-

PWDRT PBO

-

PT1

-

PT0

-

00[1] x0000000

IP0H

Interrupt priority 0 HIGH

B7H

-

PWDRT PBOH

-

PT1H

-

PT0H

-

00[1] x0000000

H

Bit address FF

FE

FD

FC

FB

FA

F9

F8

IP1*

Interrupt priority 1

F8H

-

-

-

-

-

PC

PKBI

-

00[1] 00x00000

IP1H

Interrupt priority 1 HIGH

F7H

-

-

-

-

-

PCH PKBIH

-

00[1] 00x00000

KBCON Keypad control register

94H

-

-

-

-

-

-

PATN

KBIF 00[1] xxxxxx00

_SEL

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