How to Read This Manual
Readers are required to have a general knowledge of electrical and logic circuits and microcontrollers.
Unless otherwise specified
The
μ
PD784038 in the
μ
PD784038 Subseries is treated as the representative model of the mask ROM models, the
μ
PD784031 is treated as the representative model of the ROM-less model, and the
μ
PD78P4038 is treated as the
representative model of the PROM models.
If there are functional differences
The function of each model is described individually.
Even in this case, the
μ
PD784038 Subseries is treated as the representative model. If you use the
μ
PD784038Y
Subseries, take the
μ
PD784031, 784035, 784036, 784037, 784038, and 78P4038 as the
μ
PD784031Y, 784035Y,
784036Y, 784037Y, 784038Y, and 78P4038Y, respectively.
V
DD
and V
SS
pins
This product is highly immune to noise and its power supply pins are classified into V
DD
and V
SS
, as follows. If there
is no need to classify the power supply pins, V
DD
is used as the representative pin name.
Positive power supply and GND of ports: V
DD0
, V
SS0
Positive power supply and GND of function blocks other than ports: V
DD1
, V
SS1
For a general understanding of the functions:
→
Read in accordance with the
TABLE OF CONTENTS
.
To find out about differences from the
μ
PD784026 Subseries:
→
See
APPENDIX A DIFFERENCES FROM
μ
PD784026 SUBSERIES
.
If the device operates strangely after debugging:
→
Cautions are summarized at the end of each chapter, so refer to the cautions for the relevant function.
To check the details of a register when the register name is known:
→
Use
APPENDIX D REGISTER INDEX
.
To learn the details of the function whose function name is known:
→
Refer to
APPENDIX E GENERAL INDEX
.
For the details of the instruction functions:
→
Refer to the separate
78K/IV SERIES USER’S MANUAL-INSTRUCTION (U10905E)
.
To find out about the electrical characteristics:
→
Refer to the individual Data sheet.
To find out about application examples of each function:
→
Refer to Application Note separately available.
Differences between
μ
PD784038 Subseries and
μ
PD784038Y Subseries
The functions of the
μ
PD784038 Subseries and
μ
PD784038Y Subseries are the same except the clocked serial
interface.