Philips 8-bit microcontroller with two-clock 80C51 core UM10109 Benutzerhandbuch
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
User manual
Rev. 02 — 23 May 2005
35 of 133
Philips Semiconductors
UM10109
P89LPC932A1 User manual
Table 13:
Power Control register (PCON - address 87h) bit allocation
Bit
7
6
5
4
3
2
1
0
Symbol
SMOD1
SMOD0
BOPD
BOI
GF1
GF0
PMOD1
PMOD0
Reset
0
0
0
0
0
0
0
0
Table 14:
Power Control register (PCON - address 87h) bit description
Bit
Symbol
Description
0
PMOD0
Power Reduction Mode (see
)
1
PMOD1
2
GF0
General Purpose Flag 0. May be read or written by user software, but has no effect
on operation
on operation
3
GF1
General Purpose Flag 1. May be read or written by user software, but has no effect
on operation
on operation
4
BOI
Brownout Detect Interrupt Enable. When logic 1, Brownout Detection will generate a
interrupt. When logic 0, Brownout Detection will cause a reset
interrupt. When logic 0, Brownout Detection will cause a reset
5
BOPD
Brownout Detect power-down. When logic 1, Brownout Detect is powered down and
therefore disabled. When logic 0, Brownout Detect is enabled. (Note: BOPD must
be logic 0 before any programming or erasing commands can be issued. Otherwise
these commands will be aborted.)
therefore disabled. When logic 0, Brownout Detect is enabled. (Note: BOPD must
be logic 0 before any programming or erasing commands can be issued. Otherwise
these commands will be aborted.)
6
SMOD0
Framing Error Location:
•
When logic 0, bit 7 of SCON is accessed as SM0 for the UART.
•
When logic 1, bit 7 of SCON is accessed as the framing error status (FE) for the
UART
UART
7
SMOD1
Double Baud Rate bit for the serial port (UART) when Timer 1 is used as the baud
rate source. When logic 1, the Timer 1 overflow rate is supplied to the UART. When
logic 0, the Timer 1 overflow rate is divided by two before being supplied to the
UART. (See
rate source. When logic 1, the Timer 1 overflow rate is supplied to the UART. When
logic 0, the Timer 1 overflow rate is divided by two before being supplied to the
UART. (See
)
Table 15:
Power Control register A (PCONA - address B5h) bit allocation
Bit
7
6
5
4
3
2
1
0
Symbol
RTCPD
DEEPD
VCPD
-
I2PD
SPPD
SPD
CCUPD
Reset
0
0
0
0
0
0
0
0
Table 16:
Power Control register A (PCONA - address B5h) bit description
Bit
Symbol
Description
0
CCUPD
Compare/Capture Unit (CCU) power-down: When logic 1, the internal clock to the
CCU is disabled. Note that in either Power-down mode or Total Power-down mode,
the CCU clock will be disabled regardless of this bit. (Note: This bit is overridden by
the CCUDIS bit in FCFG1. If CCUDIS = 1, CCU is powered down.)
CCU is disabled. Note that in either Power-down mode or Total Power-down mode,
the CCU clock will be disabled regardless of this bit. (Note: This bit is overridden by
the CCUDIS bit in FCFG1. If CCUDIS = 1, CCU is powered down.)
1
SPD
Serial Port (UART) power-down: When logic 1, the internal clock to the UART is
disabled. Note that in either Power-down mode or Total Power-down mode, the
UART clock will be disabled regardless of this bit.
disabled. Note that in either Power-down mode or Total Power-down mode, the
UART clock will be disabled regardless of this bit.
2
SPPD
SPI power-down: When logic 1, the internal clock to the SPI is disabled. Note that in
either Power-down mode or Total Power-down mode, the SPI clock will be disabled
regardless of this bit.
either Power-down mode or Total Power-down mode, the SPI clock will be disabled
regardless of this bit.
3
I2PD
I
2
C power-down: When logic 1, the internal clock to the I
2
C-bus is disabled. Note
that in either Power-down mode or Total Power-down mode, the I
2
C clock will be
disabled regardless of this bit.