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CHAPTER 1 OVERVIEW
●
Notes on Energization
To prevent malfunction of the internal voltage regulator, supply voltage profile while turning on the power
supply should be slower than 50 µs from 0.2 V to 2.7 V.
●
Stabilization of power supply voltage
If the power supply voltage varies acutely even within the operation assurance range of the V
CC
power
supply voltage, a malfunction may occur. The V
CC
power supply voltage must therefore be stabilized. As
stabilization guidelines, stabilize the power supply voltage so that V
CC
ripple fluctuations (peak to peak
value) in the commercial frequencies (50 to 60 Hz) fall within 10% of the standard V
CC
power supply
voltage and the transient fluctuation rate becomes 0.1 V/ms or less in instantaneous fluctuation for power
supply switching.
●
Note on using CAN Function
The MB90360 series does not contain the clock modulation function. So, at using CAN, the DIRECT bit of
the CAN direct mode register (CDMR) must be set "1". (See Table 1.7-1 ). If the DIRECT bit is not set
correctly, the device does not operate normally.
Note:
For details on the clock modulation, see "CHAPTER 6 CLOCK SUPERVISOR".
For details on the CAN direct mode, see "21.11 Setting Configuration of Multi-level Message Buffer".
Table 1.7-1 Setting of Clock Modulation and CAN Direct Mode
Clock modulation setting
(CMCR:PMOD bit)
CAN direct mode setting
(setting of CDMR:DIRECT bit)
Required setting 0: Disable clock modulation
(initial value)
1: Enable CAN direct mode
Setting disabled 1: Enable clock modulation 0: Disable CAN direct mode
(initial value)