Philips P89LPC907 用户手册

2003 Dec 8     

56

PCON
Address: 87h

Not bit addressable
Reset Source(s): Any reset
Reset Value:

00000000B 

PCON.7

SMOD1

Double Baud Rate bit for the serial port (UART) when Timer 1 is used as the baud rate 
source. When 1, the Timer 1 overflow rate is supplied to the UART. When 0, the Timer 1 
overflow rate is divided by 2 before being supplied to the UART. P89LPC907, 
P89LPC908(See Figure 8-2).

PCON.6

SMOD0

Framing Error Location (P89LPC908):

-When 0, bit 7 of SCON is accessed as SM0 for the UART.
-When 1, bit 7 of SCON is accessed as the framing error status (FE) for the UART.
This bit also determines the location of the UART receiver interrupt RI  (see description 
on RI in Figure 8-3).

PCON.5

BOPD

Brownout Detect Power down. When 1, Brownout Detect is powered down and therefore 
disabled. When 0, Brownout Detect is enabled. (Note: BOPD must be ’0’ before any 
programming or erasing commands can be issued. Otherwise these commands will be 
aborted.)

PCON.4

BOI

Brownout Detect Interrupt Enable. When 1, Brownout Detection will generate a interrupt . 
When 0, Brownout Detection will cause a reset.

PCON.3

GF1

General Purpose Flag 1. May be read or written by user software, but has no effect on 
operation.

PCON.2

GF0

General Purpose Flag 0. May be read or written by user software, but has no effect on 
operation.

PCON.1-0

PMOD1-PMOD0

Power Reduction Mode (see section "Power Reduction Modes").

7

6

5

4

3

2

1

0

SMOD1 SMOD0

BOPD

BOI

GF1

GF0

PMOD1 PMOD0