Programmable I/O Ports - Renesas M16C/29 Series User Manual

M 1 6 C 2 / 9 G o r u p

22.12 Programmable I/O Ports

1. If a low-level signal is applied to the SD pin when the IVPCR1 bit in the TB2SC register is set to 1
(three-phase output forcible cutoff by input on SD pin enabled), the P7
a high-impedance state.
2. The input threshold voltage of pins differs between programmable input/output ports and peripheral
functions.
Therefore, if any pin is shared by a programmable input/output port and a peripheral function and the
input level at this pin is outside the range of recommended operating conditions V
"high" nor "low"), the input level may be determined differently depending on which side—the program-
mable input/output port or the peripheral function—is currently selected.
3.When the SM32 bit in the S3C register is set to 1, the P3
SM42 bit in the S4C register is set to 1, the P9
4. When the INV03 bit in the INVC0 register is 1(three-phase motor control timer output enabled), an "L"
input on the P8
•When the TB2SC register IVPCR1 bit is set to 1 (three-phase output forcible cutoff by input on
_____
SD pin enabled), the U/ U/ V/ V/ W/ W pins go to a high-impedance state.
•When the TB2SC register IVPCR1 bit is set to 0 (three-phase output forcible cutoff by input on
_____
SD pin disabled), the U/ U/ V/ V/ W/ W pins go to a normal port.
Therefore, the P8
_____
When the SD function isn't used, set to 0 (Input) in PD8
outside.
R e . v 1 1 . 2 M r a 3 . , 0 2 0 0 7
R E J 0 9 B 0 1 0 1 0 - 1 1 2
_______ _____
/NMI/SD pin, has the following effect.
5
__ __
__ __
pin can not be used as programmable I/O port when the INV03 bit is set to 1.
5
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f o 4 5 8
_____
_____
pin goes to high-impedance state. When the
2
pin goes to high-imepdance state.
6
___
___
and pullup to H in the P8
5
22. Usage Notes
to P7 , P8 and P8 pins go to
2 5 0 1
and V
IH IL
_______ _____
/NMI/SD pin from
5
(neither