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Philips Semiconductors
P89LPC906/907/908
8-bit microcontrollers with two-clock 80C51 core
9397 750 14467
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Product data Rev. 05 — 17 December 2004 18 of 51
Table 8: P89LPC907 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
AUXR1 Auxiliary function register A2H ----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
[6]
xxxxxx00
CMP1 Comparator 1 control register ACH - - CE1 - CN1 OE1 CO1 CMF1 00
[1]
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
FMCON Program Flash Control
(Read)
E4H BUSY - - - HVA HVE SV OI 70 01110000
Program Flash Control
(Write)
FMCMD.
7
FMCMD.
6
FMCMD.
5
FMCMD.
4
FMCMD.
3
FMCMD.
2
FMCMD.
1
FMCMD.
0
FMDATA Program Flash data E5H 00 00000000
IEN0* Interrupt enable 0 A8H EA EWDRT EBO ES ET1 - ET0 - 00 00000000
Bit address EF EE ED EC EB EA E9 E8
IEN1* Interrupt enable 1 E8H - EST - - - EC EKBI - 00
[1]
00x00000
Bit address BF BE BD BC BB BA B9 B8
IP0* Interrupt priority 0 B8H - PWDRT PBO PS PT1 - PT0 - 00
[1]
x0000000
IP0H Interrupt priority 0 high B7H - PWDRT
H
PBOH PSH PT1H - PT0H - 00
[1]
x0000000
Bit address FF FE FD FC FB FA F9 F8
IP1* Interrupt priority 1 F8H - PST - - - PC PKBI - 00
[1]
00x00000