HD64F2145 Datasheet, PDF (209/829 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

8.4.5 Port 3 Input Pull-Up MOS
Port 3 has an on-chip input pull-up MOS function that can be controlled by software. This input
pull-up MOS function can be specified as on or off on a bit-by-bit basis.
Table 8.4 summarizes the input pull-up MOS states.
Table 8.4 Input Pull-Up MOS States (Port 3)
Mode
Reset
Hardware
Standby Mode
Software
Standby Mode
In Other
Operations
1, 2, 3 (EXPE = 1) Off
Off
Off
Off
2, 3 (EXPE = 0)
On/Off
On/Off
Legend
Off: Input pull-up MOS is always off.
On/Off: On when the pin is in the input state, P3DDR = 0, and P3PCR = 1; otherwise off.
8.5 Port 4
Port 4 is an 8-bit I/O port. Port 4 pins also function as PWMX output pins, TMR_0 and TMR_1
I/O pins, timer connection I/O pins, SCI_2 I/O pins, IrDA interface I/O pins, XBS output pins, and
the IIC_1 I/O pin. The output type of P42 and SCK2 is NMOS push-pull output. The output type
of SDA1 is NMOS open drain output. Port 4 pin functions are the same in all operating modes.
Port 4 has the following registers.
• Port 4 data direction register (P4DDR)
• Port 4 data register (P4DR)
Rev. 2.0, 08/02, page 169 of 788