xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx x x x xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xx xx

xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxx x x

xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx

xxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxx xxx

Table 4:

P89LPC904 Special function registers

* indicates SFRs that are bit addressable.

Name

Description

SFR

addr.

Bit functions and addresses

Reset value

MSB

LSB

Hex

Binary

Bit address

E7

E6

E5

E4

E3

E2

E1

E0

ACC*

Accumulator

E0H

00

00000000

ADCON1

A/D control register 1

97H

ENBI1

ENADCI

1

TMM1

EDGE1

ADCI1

ENADC1

ADCS11

ADCS10 00

00000000

ADINS

A/D input select

A3H

ADI13

-

ADI11

-----

00

00000000

ADMODA

A/D mode register A

C0H

BNDI1

BURST1

SCC1

SCAN1

----

00

00000000

ADMODB

A/D mode register B

A1H

CLK2

CLK1

CLK0

-

ENDAC1

-

BSA1

-

00

000x0000

AD1BH

A/D_1 boundary high register

C4H

FF

11111111

AD1BL

A/D_1 boundary low register

BCH

00

00000000

AD1DAT0

A/D_1 data register 0

D5H

00

00000000

AD1DAT1

A/D_1 data register 1

D6H

00

00000000

AD1DAT2

A/D_1 data register 2

D7H

00

00000000

AD1DAT3

A/D_1 data register 3

F5H

00

00000000

AUXR1

Auxiliary function register

A2H

-

EBRR

-

-

SRST

0

-

DPS

00[1]

000000x0

Bit address

F7

F6

F5

F4

F3

F2

F1

F0

B*

B register

F0H

00

00000000

BRGR0[2]

Baud rate generator rate

LOW

BEH

00

00000000

BRGR1[2]

Baud rate generator rate

HIGH

BFH

00

00000000

BRGCON

Baud rate generator control

BDH

------

SBRGS

BRGEN

00[2]

xxxxxx00

CMP1

Comparator 1 control register

ACH

-

-

CE1

-

CN1

-

CO1

CMF1

00[1]

xx000000

CMP2

Comparator 2 control register

ADH

-

-

CE2

-

CN2

-

CO2

CMF2

00

xx000000

DIVM

CPU clock divide-by-M

control

95H

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