D12320VF25IV Datasheet, PDF (465/1304 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 9 I/O Ports
9.13.3 Pin Functions
Port F pins also function as bus control signal input/output pins (AS, RD, HWR, LWR, LCAS^*,
WAIT, BREQO, BREQ, and BACK) and the system clock (φ) output pin. The pin functions differ
between modes 4 to 6, and mode 7. Port F pin functions are shown in table 9.25.
Note: * The LCAS is not supported in the H8S/2321.
Table 9.25 Port F Pin Functions
Pin
PF7/φ
Selection Method and Pin Functions
The pin function is switched as shown below according to bit PF7DDR.
PF7DDR
0
1
Pin function
PF7 input pin
φ output pin
PF6/AS
The pin function is switched as shown below according to the operating mode,
bit PF6DDR, and bit ASOD in PFCR2.
Operating
Mode
Modes 4 to 6
Mode 7
ASOD
0
1
—
PF6DDR
—
0
1
0
1
Pin function
AS output PF6 input PF6 output PF6 input PF6 output
pin
pin
pin
pin
pin
PF5/RD
The pin function is switched as shown below according to the operating mode
and bit PF5DDR.
Operating
Mode
Modes 4 to 6
Mode 7
PF5DDR
—
0
1
Pin function
RD output pin
PF5 input pin
PF5 output pin
PF4/HWR
The pin function is switched as shown below according to the operating mode
and bit PF4DDR.
Operating
Mode
Modes 4 to 6
Mode 7
PF4DDR
—
0
1
Pin function
HWR output pin
PF4 input pin
PF4 output pin
Rev.6.00 Sep. 27, 2007 Page 433 of 1268
REJ09B0220-0600