HD6417660 RENESAS [Renesas Technology Corp], HD6417660 Datasheet - Page 768

• Manufacturer Part Number: HD6417660
• Description: Renesas 32-Bit RISC Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

3. Order of turning off power
4. When the built-in power supply regulator is used, each V
5. When the built-in power supply regulator is used, each V
Rev. 1.00, 02/04, page 730 of 804
 Until voltage is applied to all power supplies and a low level is input to the RESETP pin,
 The power supply voltage of V
Though there are no strict requirements, the following points are recommended since a cutoff
of either power supply will cause unstable operation.
 In the reverse order of powering-on, first turn off the V
 Pin states are undefined while only the V
capacitor to reduce noise of power supply.
from outside. Also, the V
internal circuits remain unsettled, and so pin states are also undefined. The system design
must ensure that these undefined states do not cause erroneous system operation.
Waveforms at power-on are shown in the figure below.
ratings above and also equal to the power supply voltage of the RF IC to be connected.
power supplies. This interval should be as short as possible.
that these undefined states do not cause erroneous system operation.
All other pins*
RESETP
Vcc_28
Vcc
Note: * Except power/GND, clock related, and analog pins
Turn on power while
RESETP is low in advance
DD
Pin states undefined
pins cannot be used to supply current to the other devices.
3.3 V
2.8 V
CC
Power-On Sequence
_28 should be within the range of the absolute maximum
This period should be
as short as possible.
CC
_28 power is off. The system design must ensure
Power-on reset state
DD
DD
CC
pin should be connected to the
pin should not be applied voltage
_28 power, then turn off the 3.3 V