Philips Semiconductors
Preliminary data
Low power, low price, low pin count (20 pin)
microcontroller with 4 kbyte OTP
87LPC764
Table 8. Sources of Wakeup from Power Down Mode
Wakeup Source
Conditions
External Interrupt 0 or 1
Keyboard Interrupt
The corresponding interrupt must be enabled.
The keyboard interrupt feature must be enabled and properly set up. The corresponding interrupt must be
enabled.
Comparator 1 or 2
The comparator(s) must be enabled and properly set up. The corresponding interrupt must be enabled.
The watchdog timer must be enabled via the WDTE bit in the UCFG1 EPROM configuration byte.
Watchdog Timer Reset
Watchdog Timer Interrupt
The WDTE bit in the UCFG1 EPROM configuration byte must not be set. The corresponding interrupt must
be enabled.
Brownout Detect Reset
Brownout Detect Interrupt
Reset Input
The BOD bit in AUXR1 must not be set (brownout detect not disabled). The BOI bit in AUXR1 must not be
set (brownout interrupt disabled).
The BOD bit in AUXR1 must not be set (brownout detect not disabled). The BOI bit in AUXR1 must be set
(brownout interrupt enabled). The corresponding interrupt must be enabled.
The external reset input must be enabled.
25
2001 Oct 26
NXP [ NXP ]
