User’s Manual U16899EJ2V0UD
515
APPENDIX D LIST OF CAUTIONS
This appendix lists cautions described in this document.
“Classification (hard/soft)” in table is as follows.
Hard: Cautions for microcontroller internal/external hardware
Soft: Cautions for software such as register settings or programs
(1/24)
Chapter
Cl
assi
fi
cati
on
Function Details
of
Function
Cautions Page
Chapter 1
Hard
Pin
connection
−
Connect the AV
SS
pin to V
SS
.
pp. 19,
20
Chapter 2
Hard
Pin
functions
P31 In
the
µ
PD78F0138HD, be sure to pull the P31 pin down after reset to prevent
malfunction.
p. 38
IMS: Internal
memory size
switching
register
Regardless of the internal memory capacity, the initial values of the internal
memory size switching register (IMS) and internal expansion RAM size
switching register (IXS) of all products in the 78K0/KE1+ are fixed (IMS = CFH,
IXS = 0CH). Therefore, set the value corresponding to each product as
indicated below. In addition, set the following values to the IMS and the IXS
when using the 78K0/KE1+ to evaluate the program of a mask ROM version of
the 78K0/KE1.
p. 45
When replacing the
µ
PD78F0132H with the
µ
PD78F0138HD, note that the area
from 0081H to 0083H in the
µ
PD78F0138HD cannot be used.
p. 46
When replacing the
µ
PD78F0133H with the
µ
PD78F0138HD, note that the area
from 0081H to 0083H in the
µ
PD78F0138HD cannot be used.
p. 47
When replacing the
µ
PD78F0134H with the
µ
PD78F0138HD, note that the area
from 0081H to 0083H in the
µ
PD78F0138HD cannot be used.
p. 48
When replacing the
µ
PD78F0136H with the
µ
PD78F0138HD, note that the area
from 0081H to 0083H in the
µ
PD78F0138HD cannot be used.
p. 49
Program area
When replacing the
µ
PD78F0138H with the
µ
PD78F0138HD, note that the area
from 0081H to 0083H in the
µ
PD78F0138HD cannot be used.
p. 50
SFR area:
Special function
register
Do not access addresses to which SFRs are not assigned.
p. 54
Chapter 3
Soft
Memory
space
SP: Stack
pointer
Since RESET input makes the SP contents undefined, be sure to initialize the
SP before using the stack.
p. 61
P02, P03, P04
When P02/SO11, P03/SI11, and P04/SCK11 are used as general-purpose
ports, do not write to serial clock selection register 11 (CSIC11).
p. 85
Soft
P10, P11, P12
When P10/SCK10/TxD0, P11/SI10/RxD0, and P12/SO10 are used as general-
purpose ports, do not write to serial clock selection register 10 (CSIC10).
p. 89
Hard
P31 In
the
µ
PD78F0138HD, be sure to pull the P31 pin down after reset to prevent
malfunction.
p. 95
Chapter 4
Soft
Port
functions
−
In the case of a 1-bit memory manipulation instruction, although a single bit is
manipulated, the port is accessed as an 8-bit unit. Therefore, on a port with a
mixture of input and output pins, the output latch contents for pins specified as
input are undefined, even for bits other than the manipulated bit.
p. 108