Datasheet

Section 8 I/O Ports
Rev.7.00 Feb. 14, 2007 page 220 of 1108
REJ09B0089-0700
Port Description Pins
Mode
4
Mode
5
Mode
6
*
1
Mode
7
*
1
Port E • 8-bit I/O port
• Built-in MOS
input pull-up
PE7/D7 to PE0/D0 In 8-bit bus mode: I/O port
In 16-bit bus mode: data bus input/output
I/O port
Port F • 8-bit I/O port
• Schmitt-
triggered input
(IRQ3 to IRQ0)
PF7/φ When DDR = 0: input port
When DDR = 1 (after reset):
φ output
When DDR =
0 (after
reset): input
port
When DDR =
1: φ output
PF6/AS When ASOD = 1: I/O port
When ASOD = 0: AS output
I/O port
PF5/RD
PF4/HWR
RD, HWR output
PF3/LWR/IRQ3 In 8-bit bus mode: When LWROD = 1, I/O
port
In 16-bit bus mode: LWR output also
functioning as interrupt input pin (IRQ3)
I/O port also
functioning
as interrupt
input pins
(IRQ3 to
IRQ0)
PF2/WAIT/IRQ2/BREQO When WAITE = 0, BRLE = 0, BREQOE =
0 (after reset): I/O port also functioning as
interrupt input pin (IRQ2)
When WAITE = 1: WAIT input also
functioning as interrupt input pin (IRQ2)
When WAITE = 0, BRLE = 1, BREQOE =
1: BREQO output also functioning as
interrupt input pin (IRQ2)
PF1/BACK/IRQ1/CS5
PF0/BREQ/IRQ0/CS4
When BRLE = 0 (after reset): I/O port also
functioning as interrupt input pins (IRQ1,
IRQ0)
When CS25E = 1, PF1CS5S = 1, and
DDR = 1: Also functions as CS5 output
When CS25E = 1, PF0CS4S = 1, and
DDR = 1: Also functions as CS4 output
When BRLE = 1: BREQ input, BACK
output also functioning as interrupt input
pins (IRQ1, IRQ0)