APPENDIX D LIST OF CAUTIONS
User’s Manual U16898EJ3V0UD
402
(16/17)
Chapter
Classification
Function Details
of
Function
Cautions Page
Be sure to clear bits 4 to 7 of flash address pointer H (FLAPH) and flash address
pointer H compare register (FLAPHC) to 0 before executing the self programming
command. If the value of these bits is 1 when executing the self programming
command.
p. 281
Set the number of the block subject to a block erase, verify, or blank check (same
value as FLAPH) to FLAPHC.
p. 281
FLAPHC,
FLAPLC: Flash
address pointer
H/L compare
registers
Clear FLAPLC to 00H when a block erase is performed, and FFH when a blank
check is performed.
p. 281
pp. 284,
Shifting to self
programming
mode
Shifting to
normal mode
Be sure to perform the series of operations described above using the user
program at an address where data is not erased nor written.
285, 287,
288
Chapter 18
Soft
Flash
memory
Byte write
If a write results in failure, erase the block once and write to it again.
p. 296
−
For (A) products, the specifications are target values, and may change after
device evaluation.
p. 330
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.
p. 330
X1 oscillator
characteristics
When using the X1 oscillator, wire as follows in the area enclosed by the broken
lines in the above figures 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. 331
Chapter 20
Hard
Electrical
specificati
ons ((T)
product,
(S)
product,
(R)
product,
(A)
product)
A/D converter
The conversion accuracy may be degraded if the level of a port that is not used
for A/D conversion is changed during A/D conversion.
p. 338
−
These specifications show target values, which may change after device
evaluation. The operating voltage range may also change.
p. 342
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.
p. 342
Chapter 21
Hard
Electrical
specificati
ons
(target
values)
((T2)
product)
Allowable loss
When using the internal pull-up resistor, calculate and add the separate power
consumption.
pp. 343,
355