Port A Input Pull-Up Mos; Table 7.6 Input Pull-Up Mos States (Port A) - Renesas H8S/2111B Hardware Manual

• PA2/KIN10/PS2AC
The pin function is switched as shown below according to the combination of the KBIOE bit in
KBCRH_0 of the keyboard buffer controller, and the PA2DDR bit.
KBIOE
PA2DDR
Pin Function PA2 input pin
Note: * When the KBIOE bit is set to 1, this pin is an NMOS open-drain output, and has direct
bus drive capability. This pin can always be used as the PS2AC or KIN10 input pin.
• PA1/KIN9, PA0/KIN8
The pin function is switched as shown below according to the state of the PAnDDR bit.
PAnDDR
Pin Function
This pin can always be used as the KINm input pin. (n = 1 or 0, m = 9 or 8)
Note: *
7.10.5

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 7.6 summarizes the input pull-up MOS states.
Table 7.6 Input Pull-Up MOS States (Port A)
Reset Hardware Standby Mode Software Standby Mode
Off 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. 1.00, 05/04, page 128 of 544
0
0 1
PA2 output pin
KIN10 input pin, PS2AC input pin*
0
PAn input pin
On/Off
PS2AC output pin
PAn output pin
KINm input pin*
In Other Operations
On/Off
1
—
1