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Philips Semiconductors
User’s Manual - Preliminary -
P89LPC901/902/903
POWER MONITORING FUNCTIONS
2003 Dec 8 59
Figure 7-2: Power Control Register (PCONA)
PCONA
Address: B5H
Not bit addressable
Reset Source(s): Any reset
Reset Value: 00000000B
BIT SYMBOL FUNCTION
PCONA.7 RTCPD Real-time Clock Power down: When ’1’, the internal clock to the Real-time Clock is
disabled.
PCONA.6 - Not used. Reserved for future use.
PCONA.5 VCPD Analog Voltage Comparator Power down: When ’1’, the voltage comparator is powered
down. User must disable the voltage comparator prior to setting this bit.
PCONA.4 - Not used. Reserved for future use.
PCONA.3 - Not used. Reserved for future use.
PCONA.2 - Not used. Reserved for future use.
PCONA.1 SPD Serial Port (UART) Power down: When ’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.
PCONA.0 - Not used. Reserved for future use.
76543210
RTCPD - VCPD - - - SPD -