D12320VF25IV Datasheet, PDF (471/1304 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 9 I/O Ports
9.14.3 Pin Functions
Port G pins also function as bus control signal output pins (CS₀ to CS₃, and CAS^*). The pin
functions are different in mode 7, and modes 4 to 6. Port G pin functions are shown in table 9.27.
Note: * The CAS is not supported in the H8S/2321.
Table 9.27 Port G Pin Functions
Pin
PG4/CS0
Selection Method and Pin Functions
The pin function is switched as shown below according to the operating mode
and bit PG4DDR.
Operating
Mode
Modes 4 to 6
Mode 7
PG4DDR
Pin function
0
1
0
1
PG4 input pin CS0 output pin PG4 input pin PG4 output pin
PG3/CS1
The pin function is switched as shown below according to the operating mode
and bits PG3DDR and CS167E.
Operating
Mode
Modes 4 to 6
Mode 7
PG3DDR
0
1
0
1
CS167E
—
0
1
—
—
Pin function
PG3 input PG3 output CS1 output PG3 input PG3 output
pin
pin
pin
pin
pin
PG2/CS2
The pin function is switched as shown below according to the operating mode
and bits PG2DDR and CS25E.
Operating
Mode
Modes 4 to 6
Mode 7
PG2DDR
0
1
0
1
CS25E
—
0
1
—
—
Pin function
PG2 input PG2 output CS2 output PG2 input PG2 output
pin
pin
pin
pin
pin
Rev.6.00 Sep. 27, 2007 Page 439 of 1268
REJ09B0220-0600