Datasheet

Section 10 I/O Ports
Page 574 of 1408 R01UH0309EJ0500 Rev. 5.00
Sep 24, 2012
H8S/2456, H8S/2456R, H8S/2454 Group
10.5.5 Pin Functions
Port 5 pins also function as the pins for SCI I/Os, A/D converter inputs, interrupt inputs, I
2
C I/Os,
bus control signal I/Os, PPG outputs, TPU I/Os, and 8-bit timer I/Os. The correspondence between
the register specification and the pin functions is shown below.
• P53/IRQ3-A/ADTRG0-A
The pin function is switched as shown below according to the combination of bits TRGS1,
TRGS0, and EXTRGS in ADCR_0 of ADC, bit P53DDR, and bit ITS3 in ITSR of the
interrupt controller.
P53DDR 0 1
P53 input P53 output
ADTRG0-A input*
1
Pin function
IRQ3-A interrupt input*
2
Notes: 1. ADTRG0-A input when the EXTRGS in ADCR0 is 0, and TRGS1 = TRGS0 = 1.
2. IRQ3-A input when the ITS3 bit in ITSR is 0.