NEC NEC PD78081(A), User Manual

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CONTENTS
CHAPTER 1 OUTLINE ..................................................................................................................... 1
1.1 Features ............................................................................................................................. 1
1.2 Applications ...................................................................................................................... 2
1.3 Ordering Information ........................................................................................................ 2
1.4 Quality Grade .................................................................................................................... 3
1.5 Pin Configuration (Top View) ........................................................................................... 4
1.6 78K/0 Series Development ............................................................................................... 9
1.7 Block Diagram ................................................................................................................... 11
1.8 Outline of Function ........................................................................................................... 12
1.9 Differences between the
µ
PD78081, 78082 and 78P083, the
µ
PD78081(A), 78082(A)
and 78P083(A), and the
µ
PD78081(A2) ........................................................................... 13
CHAPTER 2 PIN FUNCTION ........................................................................................................... 15
2.1 Pin Function List ............................................................................................................... 15
2.1.1 Normal operating mode pins ............................................................................................... 15
2.1.2 PROM programming mode pins (
µ
PD78P083 only) ............................................................ 16
2.2 Description of Pin Functions ........................................................................................... 17
2.2.1 P00 to P03 (Port 0) .............................................................................................................. 17
2.2.2 P10 to P17 (Port 1) .............................................................................................................. 17
2.2.3 P30 to P37 (Port 3) .............................................................................................................. 18
2.2.4 P50 to P57 (Port 5) .............................................................................................................. 18
2.2.5 P70 to P72 (Port 7) .............................................................................................................. 19
2.2.6 P100 to P101 (Port 10) ........................................................................................................ 19
2.2.7 AV
REF
.................................................................................................................................. 20
2.2.8 AV
DD
.................................................................................................................................... 20
2.2.9 AV
SS
.................................................................................................................................... 20
2.2.10 RESET ................................................................................................................................. 20
2.2.11 X1 and X2 ............................................................................................................................ 20
2.2.12 V
DD
...................................................................................................................................... 20
2.2.13 V
SS
...................................................................................................................................... 20
2.2.14 V
PP
(
µ
PD78P083 only) ......................................................................................................... 20
2.2.15 IC (Mask ROM version only) ................................................................................................ 21
2.2.16 NC (44-pin plastic QFP versions only) ................................................................................. 21
2.3 Pin Input/Output Circuits and Recommended Connection of Unused Pins ............... 22
CHAPTER 3 CPU ARCHITECTURE ................................................................................................ 25
3.1 Memory Spaces................................................................................................................. 25
3.1.1 Internal program memory space .......................................................................................... 28
3.1.2 Internal data memory space ................................................................................................ 29
3.1.3 Special Function Register (SFR) area ................................................................................. 29
3.1.4 Data memory addressing .................................................................................................... 29
3.2 Processor Registers ......................................................................................................... 33
3.2.1 Control registers .................................................................................................................. 33
3.2.2 General registers ................................................................................................................. 36