Fujitsu F2MCTM-16LX Hardware Manual page 40

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
supply voltage, a malfunction may occur. The V
stabilization guidelines, stabilize the power supply voltage so that V
value) in the commercial frequencies (50 to 60 Hz) fall within 10% of the standard V
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.
Table 1.7-1 Setting of Clock Modulation and CAN Direct Mode
Required setting 0: Disable clock modulation
(initial value)
Setting disabled 1: Enable clock modulation
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".
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Clock modulation setting
(CMCR:PMOD bit)
power supply voltage must therefore be stabilized. As
CC
ripple fluctuations (peak to peak
CC
CAN direct mode setting
(setting of CDMR:DIRECT bit)
1: Enable CAN direct mode
0: Disable CAN direct mode
(initial value)
power
CC
power supply
CC