HD64F2145 Datasheet, PDF (237/829 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

• PA0/A16/#.,1;/CIN8
The pin function is switched as shown below according to the combination of operating mode,
the IOSE bit in SYSCR and the PA0DDR bit.
Operating
Mode
Modes 1, 2 (EXPE = 0), 3
Mode 2 (EXPE = 1)
PA0DDR
0
1
0
1
IOSE
—
—
—
0
1
Pin Function
PA0
input pin
PA0
output pin
PA0
input pin
A16
output pin
PA0
output pin
.,1; input pin, CIN8 input pin*
Note:* This pin can always be used as the .,1; or CIN8 input pin.
8.11.5 Port A Input Pull-Up MOS
Port A 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.
The input pull-up MOS for pins PA7 to PA4 is always off when IICS is set to 1. When the
keyboard buffer control pin function is selected for pins PA7 to PA2, the input pull-up MOS is
always off.
Table 8.6 summarizes the input pull-up MOS states.
Table 8.6 Input Pull-Up MOS States (Port A)
Mode
Reset
Hardware
Standby Mode
Software
Standby Mode
In Other
Operations
1, 2, 3
Off
Off
On/Off
On/Off
Legend
Off: Input pull-up MOS is always off.
On/Off: On when the pin is in the input state, PADDR = 0, and PAODR = 1; otherwise off.
Rev. 2.0, 08/02, page 197 of 788