Input Pull-Up Mos; Table 9.6 Port A Input Pull-Up Mos States - Renesas H8S/2158 User Manual

• PA0/KIN8/SSE0I
The function of port A pins is switched as shown below according to the combination of the
SSE bit in SEMR of SCI_0, the C/A bit in SMR, the CKE1 bit in SCR, and the PA0DDR bit.
When the KMIM8 bit in KMIMRA of the interrupt controller is cleared to 0, this pin can be
used as the KIN8 input pin. To use this pin as the KIN8 input pin, clear the PA0DDR bit to 0.
SSE
C/A
CKE1
PA0DDR
Pin function
9.10.5

Input Pull-Up MOS

Port A has a built-in input pull-up MOS that can be controlled by software. This input pull-up
MOS can be used in any operating mode, and can be specified as on or off on a bit-by-bit basis.
When a PADDR bit is cleared to 0, setting the corresponding PAODR bit to 1 turns on the input
pull-up MOS.
The input pull-up MOS is in the off state after a reset and in hardware standby mode. The prior
state is retained in software standby mode.
Table 9.6 summarizes the input pull-up MOS states.
Table 9.6 Port A Input Pull-Up MOS States
Hardware Standby
Reset Mode
Off Off
Legend:
Off: Always off.
On/Off: On when PADDR = 0 and PAODR = 1; otherwise off.
0
—
—
0
PA0 input pin
1
PA0 output pin
KIN8 input pin
Software Standby
Mode
On/Off
Rev. 3.00 Jan 25, 2006 page 257 of 872
Section 9 I/O Ports
1
1
1
—
SSE0I
In Other Operations
On/Off
REJ09B0286-0300