HD6412320 RENESAS [Renesas Technology Corp], HD6412320 Datasheet - Page 463

• Manufacturer Part Number: HD6412320
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family H8S-2300 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

9.13.3
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
PF
PF
PF
PF
7
6
5
4
/φ
/AS
/RD
/HWR
Pin Functions
The pin function is switched as shown below according to bit PF7DDR.
The pin function is switched as shown below according to the operating mode,
bit PF6DDR, and bit ASOD in PFCR2.
The pin function is switched as shown below according to the operating mode
and bit PF5DDR.
The pin function is switched as shown below according to the operating mode
and bit PF4DDR.
Selection Method and Pin Functions
PF7DDR
Pin function
Operating
Mode
ASOD
PF6DDR
Pin function
Operating
Mode
PF5DDR
Pin function
Operating
Mode
PF4DDR
Pin function
AS output
HWR output pin
RD output pin
Modes 4 to 6
Modes 4 to 6
pin
—
0
PF
—
—
7
Modes 4 to 6
input pin
PF
0
6
pin
0
input
Rev.6.00 Sep. 27, 2007 Page 433 of 1268
1
PF
PF
PF
5
4
6
input pin
input pin
pin
output
1
0
0
Mode 7
Mode 7
PF
φ output pin
6
pin
Section 9 I/O Ports
0
input
REJ09B0220-0600
PF
PF
Mode 7
1
5
4
—
output pin
output pin
PF
1
1
6
pin
output
1