D12320VF25IV Datasheet, PDF (434/1304 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 9 I/O Ports
Pin
PA4/A20/IRQ4
PA3/A19
PA2/A18
PA1/A17
PA0/A16
Selection Method and Pin Functions
The pin function is switched as shown below according to the combination of
the operating mode and bits A20E and PA4DDR.
Operating
mode
Modes 4 and 5
Mode 6
Mode 7
A20E
0
1
0
1
—
PA4DDR
0
1—0
1
0
1
0
1
Pin function Setting PA4 A20 PA4 PA4 PA4 A20 PA4 PA4
pro- output output input output input output input output
hibited pin pin pin pin pin pin pin pin^*2
IRQ4 interrupt input pin^*1
Notes: 1. IRQ4 input when IRQPAS = 0. Note that in this state in modes 4
and 5, although the pin designation is output-only, IRQ4 input is
also performed.
2. NMOS open-drain output when PA4ODR = 1.
The pin function is switched as shown below according to the combination of
the operating mode and bit PAnDDR.
Operating
mode
Modes
4 and 5
Mode 6
Mode 7
PAnDDR^*1
—
0
1
0
1
Pin function Am output
PAn
Am output
PAn
pin^*1
input pin^*1
pin^*1
input pin^*1
PAn
output
pin^{*1 *2}
Notes: 1. n = 0 to 3, m = 16 to 19
2. PAn output is NMOS open-drain output when PAnODR = 1.
Rev.6.00 Sep. 27, 2007 Page 402 of 1268
REJ09B0220-0600