HD6432633 Datasheet, PDF (483/1453 Pages) Renesas Technology Corp – Series of Microcomputers (MCUs: microcomputer units)

10A.12.3 Pin Functions
Port F pins also function as external interrupt input pins (IRQ2 and IRQ3), BUZZ output pin, A/D
trigger input pin (ADTRG), bus control signal input/output pins (AS, RD, HWR, LWR, LCAS,
WAIT, BREQO, BREQ, and BACK) and the system clock (ø) output pin. The pin functions differ
between modes 4 to 6, and mode 7. Port F pin functions are shown in table 10A-21.
Table 10A-21 Port F Pin Functions
Pin
PF7/ø
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
ø output pin
PF6/AS/LCAS
PF5/RD
The pin function is switched as shown below according to the combination of
the operating mode and bits RMTS2 to RMTS0, LCASS, BREQOE, WAITE,
ABW5 to ABW2, and PF2DDR.
Operating
Mode
Modes 4 to 6
Mode 7
LCASS
0
1*
—
PF6DDR
—
—
0
1
Pin function
AS output pin
LCAS
PF6 input pin PF6 output pin
output pin
Note: * Restricted to RMTS2 to RMTS0=B'001 to B'011, DRAM space 16-bit
access in modes 4 to 6 only
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
429