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Philips Semiconductors
I/O PORTS
Table 4-3: Port Output Configuration - P89LPC901
Configuration SFR Bits
Port
Pin
PxM1.y
P0.4
P0M1.4
P0.5
P0M1.5
P1.2
P1M1.2
P1.5
P3.0
P3M1.0
P3.1
P3M1.1
Table 4-4: Port Output Configuration - P89LPC902
Configuration SFR Bits
Port
Pin
PxM1.y
P0.0
P0M1.0
P0.2
P0M1.2
P0.4
P0M1.4
P0.5
P0M1.5
P0.6
P0M1.6
P1.5
Table 4-5: Port Output Configuration - P89LPC903
Configuration SFR Bits
Port
Pin
PxM1.y
P0.2
P0M1.2
P0.4
P0M1.4
P0.5
P0M1.5
P1.0
P1M1.0
P1.1
P1M1.1
P1.5
Additional Port Features
After power-up, all pins are in Input-Only mode. Please note that this is different from the LPC76x series of devices.
• After power-up, all I/O pins except P1.5, may be configured by software.
• Pin P1.5 is input only.
• Every output on the P89LPC901/902/903 has been designed to sink typical LED drive current. However, there is a maximum
total output current for all ports which must not be exceeded. Please refer to the P89LPC901/902/903 datasheet for detailed
specifications.
2003 Dec 8
Alternate Usage
PxM2.y
P0M2.4
KBI4,CIN1A
P0M2.5
KBI5,CMPREF
P1M2.2
not configurable
RST
P3M2.0
XTAL2,CLKOUT
P3M2.1
XTAL1
Alternate Usage
PxM2.y
P0M2.0
KBI0,CMP2
P0M2.2
KBI2,CIN2A
P0M2.4
KBI4,CIN1A
P0M2.5
KBI5,CMPREF
P0M2.6
KBI6,CMP1
not configurable
RST
Alternate Usage
PxM2.y
P0M2.2
KBI2,CIN2A
P0M2.4
KBI4,CIN1A
P0M2.5
KBI5,CMPREF
P1M2.0
P1M2.1
RxD
not configurable
RST
Refer to section "Port 0 Analog Functions" for usage as
analog inputs CINxA and CMPREF.
T0
Input only. Usage as general purpose input or RST is
determined by User Configuration Bit RPD (UCFG1.6).
Always a reset input during a power-on sequence.
Refer to section "Port 0 Analog Functions" for usage as
analog inputs CINxA and CMPREF.
Input only. Usage as general purpose input or RST is
determined by User Configuration Bit RPD (UCFG1.6).
Always a reset input during a power-on sequence.
Refer to section "Port 0 Analog Functions" for usage as
analog inputs CINxA and CMPREF.
TxD
Input only. Usage as general purpose input or RST is
determined by User Configuration Bit RPD (UCFG1.6).
Always a reset input during a power-on sequence.
42
User's Manual - Preliminary -
P89LPC901/902/903
Notes
Notes
Notes
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