NEC PD703114 User Manual page 387

V850e/ia2 32-bit single-chip microcontrollers

Table of Contents

CHAPTER 9 TIMER/COUNTER FUNCTION

(6) TO3 output control function by INTP4 pin

Output of the TO3 pin can be forcibly stopped by inputting a signal to the INTP4 pin if an abnormality is

detected in the power system of a motor.

If the TO3 output mode is set (PMC27 = 1 and PFC27 = 1) and if the specified valid edge is generated on the

INTP4 pin after the TO3SP bit of the timer 3 output control register (TO3C) has been set to 1, the output

buffer of the TO3 pin can be turned off (the TO3 pin goes into a high-impedance state).

To resume output of the TO3 pin (output buffer = on) after output of the TO3 pin has been stopped (output

buffer = off) by the valid edge of the INTP4 pin, rewrite the TO3SP bit from "1" to "0".

The valid edge of the INTP4 pin can be specified by the ES40 and ES41 bits of the external interrupt mode

Figure 9-95. Example of Operation of TO3 Output Control Function by INTP4 Pin

(in TO3 Output Mode (PMC27 Bit = 1 and PFC27 Bit = 1))

(When rising edge is specified)

Edge detection

Output buffer = on (output data)

Output buffer = off

(high impedance)

Note Analog delay

User's Manual U15195EJ5V0UD