Datasheet

Section 10B I/O Ports
(H8S/2695)
Page 536 of 1434 R01UH0166EJ0600 Rev. 6.00
Mar 02, 2011
H8S/2633 Group, H8S/2633 F-ZTAT
TM
,
H8S/2633R F-ZTAT
TM
, H8S/2695
10B.12.3 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, 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 10B.23.
Table 10B.23 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 0 1
Pin function PF7 input pin φ output pin
PF6/AS The pin function is switched as shown below according to the combination of
the operating mode and bits BREQOE, WAITE, ABW5 to ABW2, and
PF2DDR.
Operating
Mode
Modes 4 to 6 Mode 7
PF6DDR — 0 1
Pin function AS output pin PF6 input pin PF6 output 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