Philips LPC2194 - Table 30: Power Control Register (PCON - 0 Xe01 Fc0 C0); Table 31: Power Control for Peripherals Register for LPC2119;2129;2292 (PCONP - 0 Xe01 Fc0 C4)

System Control Block 82 May 03, 2004
Philips Semiconductors Preliminary User Manual
LPC2119/2129/2194/2292/2294ARM-based Microcontroller
Power Control for Peripherals Register (PCONP - 0xE01FC0C4)
The PCONP register allows turning off selected peripheral functions for the purpose of saving power. A few peripheral functions
cannot be turned off (i.e. the Watchdog timer, GPIO, the Pin Connect block, and the System Control block). Each bit in PCONP
controls one of the peripherals. The bit numbers correspond to the related peripheral number as shown in the VPB peripheral
map in the LPC2119/2129/2292/2294 Memory Addressing section.
Table 30: Power Control Register (PCON - 0xE01FC0C0)
PCON Function Description
Reset
Value
0IDL
Idle mode - when 1, this bit causes the processor clock to be stopped, while on-chip
peripherals remain active. Any enabled interrupt from a peripheral or an external interrupt
source will cause the processor to resume execution.
0
1PD
Power Down mode - when 1, this bit causes the oscillator and all on-chip clocks to be
stopped. A wakeup condition from an external interrupt can cause the oscillator to re-
start, the PD bit to be cleared, and the processor to resume execution.
0
7:2 Reserved
Reserved, user software should not write ones to reserved bits. The value read from a
reserved bit is not defined.
NA
Table 31: Power Control for Peripherals Register for LPC2119/2129/2292 (PCONP - 0xE01FC0C4)
PCONP Function Description
Reset
Value
0 Reserved
Reserved, user software should not write ones to reserved bits. The value read from a reserved
bit is not defined.
0
1 PCTIM0 When 1, TIMER0 is enabled. When 0, TIMER0 is disabled to conserve power. 1
2 PCTIM1 When 1, TIMER1 is enabled. When 0, TIMER1 is disabled to conserve power. 1
3 PCURT0 When 1, UART0 is enabled. When 0, UART0 is disabled to conserve power. 1
4 PCURT1 When 1, UART1 is enabled. When 0, UART1 is disabled to conserve power. 1
5 PCPWM0 When 1, PWM0 is enabled. When 0, PWM0 is disabled to conserve power. 1
6 Reserved
User software should not write ones to reserved bits. The value read from a reserved bit is not
defined.
0
7 PCI2C When 1, the I
2
C interface is enabled. When 0, the I
2
C interface is disabled to conserve power. 1
8 PCSPI0 When 1, the SPI0 interface is enabled. When 0, the SPI0 is disabled to conserve power. 1
9 PCRTC When 1, the RTC is enabled. When 0, the RTC is disabled to conserve power. 1
10 PCSPI1 When 1, the SPI1 interface is enabled. When 0, the SPI1 is disabled to conserve power. 1
11 Reserved User software should write 0 here to reduce power consumption. 1