CHAPTER 2 PIN FUNCTIONS
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User’s Manual U14359EJ4V0UM
2.3
Description of Pin Functions
(1) P00 to P07 (Port 0) ··· 3-state I/O
P00 to P07 function as an 8-bit I/O port that can be set to input or output in 1-bit units.
Besides functioning as an I/O port, in the control mode, these pins operate as I/O for the real-time pulse unit
(RPU), external interrupt request inputs, a PWM output, and DMA request inputs.
The operation mode can be set to port or control mode in 1-bit units, specified by the port 0 mode control
register (PMC0).
(a) Port mode
P00 to P07 can be set to input or output in 1-bit units using the port 0 mode register (PM0).
(b) Control mode
P00 to P07 can be set to port/control mode in 1-bit units using the PMC0 register.
(i)
PWM0 (Pulse width modulation) ··· output
This pin outputs the PWM pulse signal.
(ii) TI000 (Timer input) ··· input
This is the external count clock input pin for timer C0.
(iii) TO00 (Timer output) ··· output
This pin outputs the pulse signals for timer C0.
(iv) INTP000, INTP001 (Interrupt request from peripherals) ··· input
These are external interrupt request input pins and the external capture trigger input pins for timer
C0.
(v) INTP100 to INTP103 (Interrupt request from peripherals) ··· input
These are external interrupt request input pins.
(vi) DMARQ0 to DMARQ3 (DMA request) ··· input
These are DMA service request signals. They correspond to DMA channels 0 to 3, respectively, and
operate independently of each other. The priority order is fixed to DMARQ0 > DMARQ1 > DMARQ2
> DMARQ3.
These signals are sampled at the falling edge of the CLKOUT signal. Maintain an active level until a
DMA request is acknowledged.
Содержание V850E/MA1
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