Datasheet

Section 10 I/O Ports
Rev. 6.00 Mar. 18, 2010 Page 349 of 982
REJ09B0054-0600
10.10.5 Pin Functions
Port E pins also function as data I/O pins. The values of register and pin functions are shown
below.
• PE7/D7, PE6/D6, PE5/D5, PE4/D4, PE3/D3, PE2/D2, PE1/D1, PE0/D0
The pin functions are switched as shown below according to the combination of the operating
mode, bus mode, and the PEnDDR bit.
Operating
mode
Modes 4 to 6 Mode 7
Bus mode 8-bit bus mode 16-bit bus
mode
⎯
PEnDDR 0 1 ⎯ 0 1
Pin functions PEn input pin PEn output
pin
Data I/O pin PEn input pin PEn output
pin
Note: n = 7 to 0
10.10.6 Input Pull-Up MOS States in Port E
Port E has a built-in input pull-up MOS function that can be controlled by software. Input pull-up
MOS can be used in modes 4 to 6 and 8-bit bus mode or in mode 7 and specified as on or off on
an individual bit basis.
Table 10.6 summarizes the input pull-up MOS states in port E.
Table 10.6 Input Pull-Up MOS States in Port E
Pin States
Power-on
Reset
Hardware
Standby
Mode
Manual
Reset
Software
Standby
Mode
In Other
Operations
Data I/O (16-bit bus in
modes 4 to 6) and port
output (8-bit bus in modes 4
to 6, and mode 7)
OFF OFF OFF OFF OFF
Port input (8-bit bus in
modes 4 to 6, and mode 7)
ON/OFF ON/OFF ON/OFF
Legend:
OFF: Input pull-up MOS is always off.
ON/OFF: On when PEDDR = 0 and PEPCR = 1; otherwise off.