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CHAPTER 2 PIN FUNCTION
User’s Manual U15104EJ2V0UD
2.2.8 P120 to P125 (Port 12)
P120 to P125 constitute a 6-bit I/O port. In addition to I/O port pins, P120 to P125 also function as serial interface
data I/O and clock I/O.
The following operating modes can be specified in 1-bit units.
(1) Port mode
These pins function as an 8-bit I/O port for which input or output can be specified in 1-bit units using port mode
register 7 (PM7).
(2) Control mode
These pins function as serial interface data I/O and clock I/O pins.
(a) SI32, SO32, SI321, SO321
Serial data I/O pins of the serial interface.
(b) SCK32, SCK321
Serial clock I/O pins of the serial interface.
2.2.9 P130 to P132 (Port 13)
P130 to P132 constitute a 3-bit N-ch open-drain output port with a 12 V tolerance. In addition to output port pins,
P130 to P132 also function as timer outputs.
The following operating modes can be specified in 1-bit units.
(1) Port mode
These pins function as a 3-bit output port.
(2) Control mode
These pins function as output pins for the 8-bit timer/event counter.
TO50, TO51, TO52
These pins are output pins for the 8-bit timer/event counter.
2.2.10 EO0, EO1
These are the output pins of the charge pump of the PLL frequency synthesizer.
They output the result of phase comparison between the frequency divided by the programmable divider of the
local oscillation input (VCOL and VCOH pins) and the reference frequency.
2.2.11 VCOL, VCOH
These pins input the local oscillation frequency (VCO) of the PLL.
Because signals are input to these pins via an AC amplifier, cut the DC component of the input signals using a
capacitor.
•
VCOL
•
HF, MF input
•
This pin becomes active when the HF or MF mode is selected by software; otherwise, the pin is in the status
set by bit 2 (VCOLDMD) of the PLL mode select register (PLLMD). If VCOLDMD is reset to 0 (to connect
a pull-down resistor), however, the VCOL pin does not become active even if the HF or MF mode is selected.
In this case, set VCOLDMD to 1 (high-impedance state).
Содержание mPD178053
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