Datasheet

Section 8 I/O Ports
Rev. 3.00 Sep. 28, 2009 Page 170 of 710
REJ09B0384-0300
8.11 Port E
Port E is an 8-bit I/O port. Port E pins also function as LPC input/output. Port E has the following
registers.
• Port E data direction register (PEDDR)
• Port E output data register (PEODR)
• Port E input data register (PEPIN)
8.11.1 Port E Data Direction Register (PEDDR)
PEDDR is used to specify the input/output attribute of each pin of port E.
Bit Bit Name Initial Value R/W Description
7 PE7DDR 0 W
6 PE6DDR 0 W
5 PE5DDR 0 W
4 PE4DDR 0 W
3 PE3DDR 0 W
2 PE2DDR 0 W
1 PE1DDR 0 W
The corresponding port E pins function as output port
when the PEDDR bits are set to 1, and as input port
when cleared to 0.
This register is assigned to the same address as that
of PEPIN. When this address is read, the port E
states are returned.
0 PE0DDR 0 W