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R01UH0336EJ0102 Rev.1.02
Page 1031 of 1538
Jul 17, 2014
V850E2/PG4-L
Section 19 Timer Option Module (TAPA)
19.4.2
Asynchronous Hi-Z Control for Pin Inputs
(1)
An Example of System Configuration of Asynchronous Hi-Z Control for
Pin Inputs
When an external error detection signal is received, an interrupt is generated
and, at the same time, the motor-driving signal output is set to the Hi-Z state.
This module assumes that microcontroller operation may hang when an error
occurs. To handle such situations, external error detection signals are
continuously processed so that the motor-driving signal can be set to the Hi-Z
state even if no clock signal is being supplied.
This module only detects an error as an edge of the error-detection signal. A
fixed output level is not detected as an error (the signal has no edge).
Timer
(TAUB, TSG2)
TAPAnTHZOUT0
TAPAnTHZOUT1
TAPAnTHZOUT2
TAPAnTHASIN
TAPA
Interrupt controller
Analog noise filter
Error detection
circuit
Motor
driver IC
U
U
V
V
W
W
Port I/O