Philips P89LPC908 Port Output Configuration P89LPC906, Port Output Configuration P89LPC907

Philips Semiconductors						User’s Manual - Preliminary -
I/O PORTS						P89LPC906/907/908
Table 4-3: Port Output Configuration - P89LPC906
	Port	Configuration SFR Bits		Alternate Usage		Notes
	Pin	PxM1.y	PxM2.y
	P0.4	P0M1.4	P0M2.4	KBI4,CIN1A		Refer to section "Port 0 Analog Functions" for usage as
	P0.5	P0M1.5	P0M2.5	KBI5,CMPREF		analog inputs CIN1A and CMPREF.
	P0.6	P0M1.6	P0M2.6	KBI6,CMP1
						Input only. Usage as general purpose input or		is
							RST
	P1.5	not configurable			RST	determined by User Configuration Bit RPD (UCFG1.6).
						Always a reset input during a power-on sequence.
	P3.0	P3M1.0	P3M2.0	XTAL2,CLKOUT
	P3.1	P3M1.1	P3M2.1	XTAL1
Table 4-4: Port Output Configuration - P89LPC907
	Port	Configuration SFR Bits		Alternate Usage		Notes
	Pin	PxM1.y	PxM2.y
	P0.4	P0M1.4	P0M2.4	KBI4,CIN1A		Refer to section "Port 0 Analog Functions" for usage as
	P0.5	P0M1.5	P0M2.5	KBI5,CMPREF		analog inputs CIN1A and CMPREF.
	P0.6	P0M1.6	P0M2.6	KBI6,CMP1
	P1.0	P1M1.0	P1M2.0		TxD
	P1.2	P1M1.2	P1M2.2		T0
						Input only. Usage as general purpose input or		is
	P1.5	not configurable					RST
					RST	determined by User Configuration Bit RPD (UCFG1.6).
						Always a reset input during a power-on sequence.
Table 4-5: Port Output Configuration - P89LPC908
	Port	Configuration SFR Bits		Alternate Usage		Notes
	Pin	PxM1.y	PxM2.y
	P0.4	P0M1.4	P0M2.4	KBI4,CIN1A		Refer to section "Port 0 Analog Functions" for usage as
	P0.5	P0M1.5	P0M2.5	KBI5,CMPREF		analog inputs CIN1A and CMPREF.
	P0.6	P0M1.6	P0M2.6	KBI6,CMP1
	P1.0	P1M1.0	P1M2.0		TxD
	P1.1	P1M1.1	P1M2.1		RxD
						Input only. Usage as general purpose input or		is
	P1.5	not configurable					RST
					RST	determined by User Configuration Bit RPD (UCFG1.6).
						Always a reset input during a power-on sequence.

Table 4-6: 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 P89LPC906/907/908 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 P89LPC906/907/908 datasheet for detailed specifications.

2003 Dec 8 38