Section 8 I/O Ports
Rev. 1.00 Mar. 12, 2008 Page 187 of 1178
REJ09B0403-0100
Section 8 I/O Ports
8.1
I/O Ports for the H8S/2472 Group
Table 8.1 is a summary of the port functions. The pins of each port also function as input/output
pins of peripheral modules and interrupt input pins. Each input/output port includes a data
direction register (DDR) that controls input/output and a data register (DR) that stores output data.
DDR and DR are not provided for input-only ports.
Pins of ports 1 to 4, 6, and A and pins D0 to D5 of port D have built-in input pull-up MOSs. For
port A pins and D0 to D5 pins, the on/off status of the input pull-up MOS is controlled by their
respective DDR and the output data register (ODR). Ports 1 to 3, and 6 have an input pull-up MOS
control register (PCR), in addition to DDR and DR, to control the on/off status of the input pull-up
MOSs.
Port 3 pins and pins 47 to 44 and B3 to B0 have built-in de-bouncers (DBn) that eliminate noises
in the input signals.
Ports 4 and F are designed for retain state outputs (RSn), which retain the output values on the
pins even if a reset is generated when the watchdog timer has overflowed.
Ports 1 to 6, and 8 to E can drive a single TTL load and 30 pF capacitive load. All the I/O ports
can drive a Darlington transistor in output mode. Port pins 80 to 83, C0 to C5, D6, and D7 are
NMOS push-pull output.
Содержание H8S Family
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Страница 206: ...Section 6 Bus Controller BSC Rev 1 00 Mar 12 2008 Page 158 of 1178 REJ09B0403 0100...
Страница 420: ...Section 9 14 Bit PWM Timer PWMX Rev 1 00 Mar 12 2008 Page 372 of 1178 REJ09B0403 0100...
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Страница 552: ...Section 14 CRC Operation Circuit CRC Rev 1 00 Mar 12 2008 Page 504 of 1178 REJ09B0403 0100...
Страница 588: ...Section 15 Serial Communication Interface with FIFO SCIF Rev 1 00 Mar 12 2008 Page 540 of 1178 REJ09B0403 0100...
Страница 632: ...Section 17 Synchronous Serial Communication Unit SSU Rev 1 00 Mar 12 2008 Page 584 of 1178 REJ09B0403 0100...
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Страница 804: ...Section 19 LPC Interface LPC Rev 1 00 Mar 12 2008 Page 756 of 1178 REJ09B0403 0100...
Страница 838: ...Section 20 Ethernet Controller EtherC Rev 1 00 Mar 12 2008 Page 790 of 1178 REJ09B0403 0100...
Страница 964: ...Section 24 RAM Rev 1 00 Mar 12 2008 Page 916 of 1178 REJ09B0403 0100...
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