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H8S/2224 Scheda tecnica(PDF) 407 Page - Renesas Technology Corp

Il numero della parte H8S/2224
Spiegazioni elettronici  16-Bit Single-Chip Microcomputer H8S Family/H8S/2200 Series
PDF  1071 Pages
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Produttore elettronici  RENESAS [Renesas Technology Corp]
Homepage  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

H8S/2224 Scheda tecnica(HTML) 407 Page - Renesas Technology Corp

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Section 10 I/O Ports
Rev. 5.00 Aug 08, 2006 page 321 of 982
REJ09B0054-0500
• P30/TxD0
The pin functions are switched as shown below according to the combination of the TE bit in
SCR_0 of SCI_0 and the P30DDR bit.
TE
01
P30DDR
01
Pin functions
P30 input pin
P30 output pin*
TxD0 output*
Note:
* When P30ODR is set to 1, it functions as NMOS open drain output.
10.3
Port 4
Port 4 is an 8-bit input port and has the following register.
• Port 4 register (PORT4)
10.3.1
Port 4 Register (PORT4)
PORT4 shows port 4 pin states.
Bit
Bit Name
Initial Value
R/W
Description
7P47
—*
R
6P46
—*
R
5P45
—*
R
4P44
—*
R
3P43
—*
R
2P42
—*
R
1P41
—*
R
0P40
—*
R
The pin states are always read when a port 4 read
is performed.
Note:
* Determined by the states of pins P47 to P40.
10.3.2
Pin Functions
Port 4 pins also function as A/D converter analog input pins (AN7 to AN0).



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