h8s-2161b Renesas Electronics Corporation., h8s-2161b Datasheet - Page 264

• Manufacturer Part Number: h8s-2161b
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 8 I/O Ports
Note:
8.11.5
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
Mode
1 to 3
Legend:
Off:
On/Off: On when the pin is in the input state, PADDR = 0, and PAODR = 1; otherwise off.
Rev. 3.00 Mar 21, 2006 page 210 of 788
REJ09B0300-0300
Operating
Mode
PA0DDR
IOSE
Pin Function
PA0/A16/ KIN8/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.
* This pin can always be used as the KIN8 or CIN8 input pin.
Input pull-up MOS is always off.
Port A Input Pull-Up MOS
Input Pull-Up MOS States (Port A)
Reset
Off
Modes 1, 2 (EXPE = 0), 3
input pin
PA0
—
0
Hardware
Standby Mode
Off
output pin
PA0
—
1
KIN8 input pin, CIN8 input pin *
input pin
PA0
Software
Standby Mode
On/Off
—
0
Mode 2 (EXPE = 1)
output pin
A16
0
In Other
Operations
On/Off
1
output pin
PA0
1