Pin Functions - Renesas H8S/2319 series Hardware Manual

8.11.3

Pin Functions

Port F pins also function as bus control signal input/output pins (AS, RD, HWR, LWR, WAIT,
BREQ, BACK, BREQO, CS4, and CS5) the system clock (φ) output pin and interrupt input pins
(IRQ0 to IRQ3). The pin functions differ between modes 4 to 6 *
functions are shown in table 8-20.
Table 8-20 Port F Pin Functions
Pin Selection Method and Pin Functions
PF7/φ The pin function is switched as shown below according to bit PF7DDR.
PF7DDR
Pin function
PF6/AS The pin function is switched as shown below according to the operating mode,
and bit PF6DDR, and bit ASOD in PFCR2.
Operating
Mode
ASOD
PF6DDR
Pin function
PF5/RD The pin function is switched as shown below according to the operating mode
and bit PF5DDR.
Operating
Mode
PF5DDR
Pin function
PF4/HWR The pin function is switched as shown below according to the operating mode
and bit PF4DDR.
Operating
Mode
PF4DDR
Pin function
Rev. 5.00, 12/03, page 284 of 1088
0
PF7 input pin
Modes
1
4 to 6 *
0
— 0
AS output
PF6 input
pin pin
Modes
1
4 to 6 *
—
RD output pin
Modes
1
4 to 6 *
—
HWR output pin
1 , and mode 7 * 1
. Port F pin
φ output pin
Mode 7 *
1
1 0
PF6 output PF6 input
pin pin
Mode 7 *
0
PF5 input pin PF5 output pin
Mode 7 *
0
PF4 input pin PF4 output pin
1
1
—
1
PF6 output
pin
1
1
1
1