Datasheet

V850ES/JG3 APPENDIX E LIST OF CAUTIONS
R01UH0015EJ0300 Rev.3.00 Page 867 of 870
Sep 30, 2010
(34/36)
Chapter
Classification
Function Details of
Function
Cautions Page
The standby mode is released by the pseudo RRM function and DMM function if
one of the following conditions is satisfied.
• Mode for communication between MINICUBE2 and the target device is CSIB0
or CSIB3
• Mode for communication between MINICUBE2 and the target device is
UARTA0, and the main clock has been supplied.
p. 761
Peripheral I/O registers that requires a specific sequence cannot be written with
the DMM function.
p. 761
Cautions (other
than DUC)
If a space where the debug monitor program is allocated is rewritten by flash self
programming, the debugger can no longer operate normally.
p. 761
Chapter 28
Soft
On-chip
debug
function
Security ID After the flash memory is erased, 1 is written to the entire area. p. 762
Be sure not to exceed the absolute maximum ratings (MAX. value) of each supply
voltage.
p. 765
Do not directly connect the output (or I/O) pins of IC products to each other, or to
V
DD, VCC, and GND. Open-drain pins or open-collector pins, however, can be
directly connected to each other.
Direct connection of the output pins between an IC product and an external circuit
is possible, if the output pins can be set to the high-impedance state and the
output timing of the external circuit is designed to avoid output conflict.
p. 766
Absolute
maximum
ratings
Product quality may suffer if the absolute maximum rating is exceeded even
momentarily for any parameter. That is, the absolute maximum ratings are rated
values at which the product is on the verge of suffering physical damage, and
therefore the product must be used under conditions that ensure that the absolute
maximum ratings are not exceeded. The ratings and conditions indicated for DC
characteristics and AC characteristics represent the quality assurance range
during normal operation.
p. 766
The oscillation frequency shown above indicates only oscillator characteristics.
Use the V850ES/JG3 so that the internal operation conditions do not exceed the
ratings shown in AC Characteristics and DC Characteristics.
p. 768
Time required to set up the flash memory. Secure the setup time using the OSTS
register.
p. 768
Hard
When using the main clock oscillator, wire as follows in the area enclosed by the
broken lines in the above figure to avoid an adverse effect from wiring
capacitance.
• Keep the wiring length as short as possible.
• Do not cross the wiring with the other signal lines.
• Do not route the wiring near a signal line through which a high fluctuating
current flows.
• Always make the ground point of the oscillator capacitor the same potential as
V
SS.
• Do not ground the capacitor to a ground pattern through which a high current
flows.
• Do not fetch signals from the oscillator.
p. 768
Soft
When the main clock is stopped and the device is operating on the subclock, wait
until the oscillation stabilization time has been secured by the program before
switching back to the main clock.
p. 768
Main clock
oscillator
characteristics
For the resonator selection and oscillator constant, customers are requested to
either evaluate the oscillation themselves or apply to the resonator manufacturer
for evaluation.
p. 768
Chapter 29
Hard
Electrical
specifica-
tions
Subclock
oscillator
characteristics
The oscillation frequency shown above indicates only oscillator characteristics.
Use the V850ES/JG3 so that the internal operation conditions do not exceed the
ratings shown in AC Characteristics and DC Characteristics.
p. 770