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NchS bit (Selection of output form for the serial I/O port pins)
Set the serial interface input/output circuit type. Setting this bit to "0" to select the CMOS circuit form, and setting
this bit to "1" to select the N-ch open-drain circuit.
Selection of output form for serial I/O port pins
NchS
I/Oポート3
0
CMOS形式
1
Note:
Select the N-ch open-drain setting when the 2-wired mode is selected.
Note:
This bit is also effective when the UART is selected.
Note:
This bit is reset to "0" after a system reset.
SIS bit (Selection of SDIO pin or SI pin for serial input)
Select a serial input pin. Set this bit to "0" to select the SDIO pin for serial input. Set this bit to "1" to select the SI
pin for serial input.
The I/O port function is enabled for the SI pin. Therefore, when the SI input pin is used for serial input, it is
necessary to set the I/O port corresponding to this pin as an input port. When the SDIO pin is used for serial input, the
SI pin can be used as an I/O port.
Selection of SDIO or SI pins for serial input
Note:
When the SI pin is selected, set the I/O port corresponding to this pin as an input port.
Note:
When the SDIO input is selected, the SI pin can be used as a normal I/O port.
Note:
Select the SDIO input when UART is selected.
Note:
This bit is reset to "0" after a system reset.
0: Select the CMOS output form
(NchS bit)
1: Select the N-ch open-drain output form
I/Oポート8
I/O port 3
I/O port 8
設定禁止
CMOS type
Setting disabled
Nchオープンドレイン形式
N-ch open-drain type
0: Select the SDIO input pin
(SIS bit)
1: Select the SI input pin
76
TC9349AFG
2006-02-24
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