Datasheet

Section 8 I/O Ports
Rev. 3.00 Mar 21, 2006 page 199 of 788
REJ09B0300-0300
• P80/HA0/PME
*
3
The pin function is switched as shown below according to the combination of the HI12E bit in
SYSCR2, the PMEE bit in HICR0, and the P80DDR bit.
PMEE 0 1
HI12E 0 1 0
*
1
P80DDR 0 1 — 0
*
1
P80 input pin P80 output pin HA0 input pin
*
2
PME output pinPin Function
PME input pin
*
2
*
3
Notes: 1. When bit PMEE is set to 1 in HICR0, bits HI12E and P80DDR should be cleared to 0.
2. The HA0 input pin can only be used in mode 2 or 3 (EXPE = 0).
3. Not supported by the H8S/2148B and H8S/2145B (5-V version).
8.10 Port 9
Port 9 is an 8-bit I/O port. Port 9 pins also function as external interrupt input pins, the A/D
converter input pin, host interface (XBS) input pins, the IIC_0 I/O pin, the subclock input pin, bus
control signal I/O pins, and the system clock (φ) output pin. P97 is an NMOS push-pull output.
SDA0 is an NMOS open-drain output, and has direct bus drive capability. Port 9 has the following
registers.
• Port 9 data direction register (P9DDR)
• Port 9 data register (P9DR)