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Philips Semiconductors
RTCF
ERTC
(RTCCON.1)
WDOVF
(1) See
Section 10 "Capture/Compare Unit
Fig 9. Interrupt sources, interrupt enables, and power-down wake-up sources.
5. I/O ports
The P89LPC938 has four I/O ports: Port 0, Port 1, Port 2, and Port 3. Ports 0, 1, and 2 are
8-bit ports and Port 3 is a 2-bit port. The exact number of I/O pins available depends upon
the clock and reset options chosen (see
Table 23:
Clock source
On-chip oscillator or watchdog
oscillator
User manual
IE0
EX0
IE1
EX1
BOF
EBO
KBIF
EKBI
EWDRT
CMF2
CMF1
EC
EA (IE0.7)
TF0
ET0
TF1
ET1
TI & RI/RI
ES/ESR
TI
EST
SI
EI2C
SPIF
ESPI
(1)
any CCU interrupt
ECCU
EEIF
EIEE
ENADCI0
ADCI0
ENBI1
BNDI1
EADC
(CCU)".
Number of I/O pins available
Rev. 03 — 7 June 2005
Table
23).
Reset option
No external reset (except during power up) 26
External RST pin supported
UM10119
P89LPC938 User manual
wake-up
(if in power-down)
interrupt
to CPU
002aab104
Number of I/O
pins
25
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
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