Datasheet

Table Of Contents
Section 9 I/O Ports
Rev. 2.00 Jul. 04, 2007 Page 196 of 692
REJ09B0309-0200
9.12 Port E
Port E is an I/O port; its pins can also be configured to function as external interrupt input pins,
SCI3_2 I/O pins, SCI3_3 I/O pins, and timer C input pin. Figure 9.12 shows its pin configuration.
PE4(/RXD32)
PE7/TMIC(/IRQ0)
PE6/UD
PE5(/TXD32)
PE0/SCK33(/IRQ3)
PE3(/SCK32/IRQ1)
PE2/TXD33
PE1/RXD33
Port E
Figure 9.12 Port E Pin Configuration
Port E has the following registers.
Port data register E (PDRE)
Port control register E (PCRE)
Port mode register E (PMRE)
9.12.1 Port Data Register E (PDRE)
PDRE is a register that stores data of port E.
Bit Bit Name
Initial
Value
R/W Description
7
6
5
4
3
2
1
0
PE7
PE6
PE5
PE4
PE3
PE2
PE1
PE0
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
If port E is read while PCRE bits are set to 1, the values
stored in PDRE are read, regardless of the actual pin
states. If port E is read while PCRE bits are cleared to
0, the pin states are read.