h8s-2172 Renesas Electronics Corporation., h8s-2172 Datasheet - Page 280

• Manufacturer Part Number: h8s-2172
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family H8s-2100 Series
• Manufacturer: Renesas Electronics Corporation.

8.7.4
Port 7 pins also function as the pins for external address bus output and interrupt input. The
correspondence between the register specification and the pin functions is shown below.
• P77/A7/IRQ7
Note:
• P76/A6/IRQ6
Note:
• P75/A5/IRQ5
Note:
Rev. 2.00, 03/04, page 248 of 534
EXPE
ALOE
P77DDR
Pin function
EXPE
ALOE
P76DDR
Pin function
EXPE
ALOE
P75DDR
Pin function
The pin function is switched as shown below according to the combination of the P77DDR bit,
the EXPE bit in MDCR, the ALOE bit in PFCR1, and the ISS7 bit in ISSR.
The pin function is switched as shown below according to the combination of the P76DDR bit,
the EXPE bit in MDCR, the ALOE bit in PFCR1, and the ISS6 bit in ISSR.
The pin function is switched as shown below according to the combination of the P75DDR bit,
the EXPE bit in MDCR, the ALOE bit in PFCR1, and the ISS5 bit in ISSR.
*
*
*
Pin Functions
When ISS7 = 0, this pin functions as IRQ7 interrupt input.
When ISS6 = 0, this pin functions as IRQ6 interrupt input.
When ISS5 = 0, this pin functions as IRQ5 interrupt input.
P75 input
P76 input
P77 input
0
0
0


0
0

0
P76 output
P75 output
P77 output
1
1
1
IRQ7 interrupt input*
IRQ6 interrupt input*
IRQ5 interrupt input*
P76 input
P75 input
P77 input
0
0
0
0
0
0
P76 output
P75 output
P77 output
1
1
1
1
1
1
A7 output
A5 output
A6 output



1
1
1