Philips P89LPC907, P89LPC906 PIN Descriptions P89LPC908, Keyboard Input P1.0 P1.5, P1.1, RxD

Philips Semiconductors					User’s Manual - Preliminary -
GENERAL DESCRIPTION					P89LPC906/907/908
PIN DESCRIPTIONS - P89LPC908
Mnemonic	Pin no.	Type	Name and function
P0.4 - P0.6	3, 7,8	I/O	Port 0:	Port 0 is an I/O port with a user-configurable output types. During reset Port
				0 latches are configured in the input only mode with the internal pullup
				disabled. The operation of port 0 pins as inputs and outputs depends upon
				the port configuration selected. Each port pin is configured independently.
				Refer to the section Port Configurations on page 35 and the DC Electrical
				Characteristics in the datasheet for details.
			The Keypad Interrupt feature operates with port 0 pins.
			All pins have Schmitt triggered inputs.
			Port 0 also provides various special functions as described below.
	8	I/O	P0.4	Port 0 bit 4.
		I	CIN1A	Comparator 1 positive input.
		I	KBI4	Keyboard Input 4.
	7	I/O	P0.5	Port 0 bit 5.
		I	CMPREFComparator reference (negative) input.
		I	KBI5	Keyboard Input 5.
	3	I/O	P0.6	Port 0 bit 6.
		O	CMP1	Comparator 1 output.
		I	KBI6	Keyboard Input 6.
P1.0 - P1.5	1,4,5		Port 1:	Port 1 is an I/O port with a user-configurable output types. During reset Port
				1 latches are configured in the input only mode with the internal pull-up
				disabled. The operation of the configurable port 1 pins as inputs and
				outputs depends upon the port configuration selected. Each of the
				configurable port pins are programmed independently. Refer to the section
				Port Configurations on page 35 and the DC Electrical Characteristics in the
				datasheet for details.
			P1.5 is input only.
			All pins have Schmitt triggered inputs.
			Port 1 also provides various special functions as described below.
	5	I/O	P1.0	Port 1 bit 0.
		O	TxD	Serial port transmitter data.
	4	I/O	P1.1	Port 1 bit 1.
		I	RxD	Serial port receiver data.
	1	I	P1.5	Port 1 bit 5. (Input only)
		I	RST	External Reset input during power-on or if selected via UCFG1. When
				functioning as a reset input a low on this pin resets the microcontroller,
				causing I/O ports and peripherals to take on their default states, and the
				processor begins execution at address 0. Also used during a power-on
				sequence to force In-Circuit Programming mode.
VSS	2	I	Ground: 0V reference.
VDD	6	I	Power Supply: This is the power supply voltage for normal operation as well as Idle
			and Power down modes.

2003 Dec 8 14