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Chapter 2
Pin Functions
Preliminary User’s Manual U15839EE1V0UM00
(13) ANI00 to ANI11 (Analog input) … Input
These are analog input pins to the A/D converter.
(14) MODE0 to MODE2 (Mode) … Input
These are the input pins that specify the operation mode. Operation modes are broadly divided
into normal operation modes and flash memory programming mode. The operation mode is deter-
mined by sampling the status of each of pins MODE0 to MODE2 on a reset.
Fix these so that the input level does not change during operation.
(15) RESET (Reset) … Input
RESET input is asynchronous input. When a signal having a certain low level width is input in
asynchronous with the operation clock, a system reset that takes precedence over all operations
occurs.
Besides a normal initialize or start, this signal is also used to release a standby mode (HALT,
IDLE, Watch, Sub-Watch software STOP).
(16) RESOUT (Reset) … Output
RESOUT output is a 3.3 V reset output signal. It is the internal system reset output. RESOUT is
active (low) in case of an external reset by RESET input pin or internal reset by watch-dog timer. If
the RESOUT output pin is connected to a RESET-IN of an external flash memory it can be used to
terminate an embedded erase/programming operation at the occurrence of a valid RESET signal.
(17) NMI (NON-Maskable Interrupt Request)... input
This is the non-maskable interrupt request input pin.
(18) X1, X2 (Crystal)
These pins connect a resonator for system main-clock generation.
(19) XT1, XT2 (Crystal)
These pins connect a resonator for the sub-clock generation.
(20) CV
DD
(Power supply for clock generator)
This is the positive power supply pin for the clock generator.
(21) CV
SS
(Ground for clock generator)
This is the ground pin for the clock generator.
(22) V
DD50
to V
DD52
(Power supply)
These are the positive 5 V power supply pins.
Содержание mPD703128
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