HD64F2638F20J Datasheet, PDF (346/1512 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2600 Series

Section 9 I/O Ports
H8S/2639, H8S/2638, H8S/2636,
H8S/2630, H8S/2635 Group
9.11.3 Pin Functions
Port F pins also function as external interrupt input pins (IRQ2 and IRQ3), A/D trigger input pin
(ADTRG), bus control signal input/output pins (AS, RD, HWR, LWR), 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 9-21.
Table 9-21 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
φ output
PF6/AS
The pin function is switched as shown below according to bit PF6DDR.
Operating
Mode
Modes 4 to 6
Mode 7
PF6DDR
Pin function
—
AS output
0
PF6 input
1
PF6 output
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
PF5 input
PF5 output
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
Pin function
—
HWR output
0
PF4 input
1
PF4 output
Page 296 of 1458
REJ09B0103-0800 Rev. 8.00
May 28, 2010