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HD6433636SW Folha de dados(PDF) 171 Page - Renesas Technology Corp

Nome de Peças HD6433636SW
Descrição Electrónicos  8-Bit Microcomputer
PDF  418 Pages
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Fabricante Electrônico  RENESAS [Renesas Technology Corp]
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HD6433636SW Folha de dados(HTML) 171 Page - Renesas Technology Corp

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8.10
Port B
8.10.1
Overview
Port B is an 4-bit input-only port configured as shown in figure 8.9.
PB /AN
PB /AN
PB /AN
PB /AN
7
6
5
4
7
6
5
4
Port B
Figure 8.9 Port B Pin Configuration
8.10.2
Register Configuration and Description
Table 8.26 shows the port B register configuration.
Table 8.26
Port B Register
Name
Abbrev.
R/W
Address
Port data register B
PDRB
R
H'FFDE
Port Data Register B (PDRB)
Bit
76543210
PB
7
PB
6
PB
5
PB
4
————
Read/Write
RRRR
————
Reading PDRB always gives the pin states. However, if a port B pin is selected as an analog input
channel for the A/D converter by AMR bits CH3 to CH0, that pin reads 0 regardless of the input
voltage.



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