The Microcontroller Idea Book - Jan Axelson's Lakeview Research

More documents

Recommendations

Info

Chapter 3 24 The Microcontroller Idea Book
Powering Up Table 3-1. Parts list for Figure 3-1’s circuit. Semiconductors LED1 U1 U2 U3 U4 U5 U6 U7 Light-emitting diode 74HC14 quad inverting Schmitt trigger 8052-BASIC or 80C52-BASIC microcontroller 74HCT08 quad AND gate 74HCT373 octal transparent latch MAX232, RS-232 driver/receiver 74HCT138 3-to-8-line decoder 6264 (8 kilobyte) or 62256 (32 kilobyte) static RAM, access time 250ns or less Resistors (1/4-watt, 5% tolerance) R1-R9 R10 10,000-ohm 330-ohm Capacitors (16WVDC, 20% tolerance) C1,C8 C2,C3 C4-C7 C9-C13 10-microfarad, aluminum or tantalum electrolytic 30-picofarad ,ceramic disc 1.0-microfarad,aluminum or tantalum electrolytic 0.1-microfarad, ceramic disc Miscellaneous J1-J3 S1 XTAL1 SIP header, 3-terminal, and shorting block Switch, normally-open momentary pushbutton 11.0592-Mhz crystal RS232 connector, IC sockets, perforated board, wire, solder, and other circuit-construction materials The Microcontroller U2 is the 8052-BASIC chip. The circuit is designed so that you can use either the NMOS version or the CMOS 80C52-BASIC. EA, the External Access Enable input (pin 31 of U2), connects to +5V. This causes the 8052 to run the BASIC-52 interpreter in ROM on boot-up. If EA is low, the 8052 ignores its internal ROM and instead accesses external program memory on boot-up. You can wire EA directly The Microcontroller Idea Book 25
Page 1 and 2: The Microcontroller Idea Book Circu
Page 3 and 4: Table of Contents Chapter 1 Microco
Page 5 and 6: Chapter 11 Control Circuits 185 Swi
Page 7 and 8: Introduction Introduction This book
Page 9 and 10: A chapter on assembly-language inte
Page 11 and 12: Microcontroller Basics 1 Microcontr
Page 13 and 14: But along with cheap, powerful, and
Page 15 and 16: makes sense. For simpler designs, a
Page 17 and 18: Microcontroller Basics Several tech
Page 19 and 20: Interpreters and compilers are two
Page 21 and 22: Inside the 8052-BASIC 2 Inside the
Page 23 and 24: Inside the 8052-BASIC • You can a
Page 25 and 26: hardware manuals. For programming,
Page 27 and 28: Inside the 8052-BASIC Figure 2-2 Pi
Page 29 and 30: Inside the 8052-BASIC Table 2-2. (p
Page 31 and 32: Inside the 8052-BASIC Code and data
Page 33: Powering Up 3 Powering Up This chap
Page 37 and 38: Powering Up Figure 3-2. Truth table
Page 39 and 40: Powering Up Jumper J3 chooses the c
Page 41 and 42: Powering Up Figure 3-3. This is the
Page 43 and 44: Powering Up Construction Tips These
Page 45 and 46: Powering Up Serial Connectors Conne
Page 47 and 48: You’re now ready to power up the
Page 49 and 50: Powering Up PRINT XTAL Line Editing
Page 51 and 52: Powering Up PORT 1 Bit Values: Bit
Page 53 and 54: Powering Up Listing 3-3. Allows use
Page 55 and 56: 10 CLOCK 1:TIME=0:SEC=0 20 A=0 30 P
Page 57 and 58: Saving Programs 4 Saving Programs I
Page 59 and 60: guaranteed for at least ten years.
Page 61 and 62: Saving Programs Figure 4-3. Circuit
Page 63 and 64: Jumper J4 is optional. It enables y
Page 65 and 66: memory on bootup. This is what allo
Page 67 and 68: This is the recommended algorithm f
Page 69 and 70: Saving Programs Figure 4-5. Additio
Page 71 and 72: problems with EPROMs that have a 10
Page 73 and 74: supply. The chip requires an additi
Page 75 and 76: Programming 5 Programming When you
Page 77 and 78: Subroutines have two advantages. Fi
Page 79 and 80: Programming • Hexadecimal numbers
Page 81 and 82: Programming It can be hard to find
Page 83 and 84: Programming Math Operators = + - *
Page 85 and 86:
Programming expression / expression
Page 87 and 88:
Programming DO: [program statements
Page 89 and 90:
Programming LOG(expression) Returns
Page 91 and 92:
Programming PH0.@ Same as PRINT@, b
Page 93 and 94:
Programming RCAP2 Retrieves or assi
Page 95 and 96:
Programming PRINT TAB(2) “hello
Page 97 and 98:
Inputs and Outputs 6 Inputs and Out
Page 99 and 100:
Unassigned space remains in the mem
Page 101 and 102:
U11 is a 74HCT138 3-to-8-line decod
Page 103 and 104:
If you wish, you can wire U14’s i
Page 105 and 106:
Inputs and Outputs Figure 6-4. Outp
Page 107 and 108:
Inputs and Outputs Listing 6-2. Set
Page 109 and 110:
The 82C55 also has CMOS-compatible
Page 111 and 112:
Inputs and Outputs Pin Symbol Input
Page 113 and 114:
Inputs and Outputs An 8255 Interfac
Page 115 and 116:
Inputs and Outputs XBY(0FC03h)=9BH
Page 117 and 118:
To set or clear a different bit, de
Page 119 and 120:
Switches and Keypads 7 Switches and
Page 121 and 122:
Switches and Keypads Figure 7-2. Us
Page 123 and 124:
exact value depending on the switch
Page 125 and 126:
Switches and Keypads Figure 7-4. Tw
Page 127 and 128:
Switches and Keypads Figure 7-6. A
Page 129 and 130:
Switches and Keypads Custom Keypads
Page 131 and 132:
Switches and Keypads • A single c
Page 133 and 134:
Switches and Keypads Listing 7-3. T
Page 135 and 136:
Displays 8 Displays In addition to
Page 137 and 138:
Displays Figure 8-1. LED interfaces
Page 139 and 140:
Displays Figure 8-2. Ways to connec
Page 141 and 142:
Displays Figure 8-4. Four output po
Page 143 and 144:
Displays Figure 8-5. The ICM7218D c
Page 145 and 146:
In Figure 8-5’s circuit, an 82(C)
Page 147 and 148:
Displays Figure 8-7. With the TC721
Page 149 and 150:
Displays Figure 8-8. With a charact
Page 151 and 152:
Table 8-1. LCD modules containing t
Page 153 and 154:
Each character in the CG ROM and CG
Page 155 and 156:
Displays Interfacing Full control o
Page 157 and 158:
Displays Listing 8-4 (page 2 0f 2).
Page 159 and 160:
Displays Listing 8-5. Displays key
Page 161 and 162:
Displays Listing 8-6 (page 2 of 2).
Page 163 and 164:
Using Sensors to Detect and Measure
Page 165 and 166:
• What power supplies are availab
Page 167 and 168:
Page 169 and 170:
Page 171 and 172:
different ground symbols for the tw
Page 173 and 174:
10 REM use single-ended mode 20 REM
Page 175 and 176:
Page 177 and 178:
Page 179 and 180:
Page 181 and 182:
Clocks and Calendars 10 Clocks and
Page 183 and 184:
Listing 10-1. Uses BASIC-52’s rea
Page 185 and 186:
Clocks and Calendars Figure 10-1. P
Page 187 and 188:
Clocks and Calendars Table 10-1. Re
Page 189 and 190:
If you want an alarm frequency othe
Page 191 and 192:
Clocks and Calendars Listing 10-3 (
Page 193 and 194:
Clocks and Calendars Listing 10-3 (
Page 195 and 196:
Control Circuits 11 Control Circuit
Page 197 and 198:
the LSTTL part, and wire the desire
Page 199 and 200:
Control Circuits Listing 11-1. Cont
Page 201 and 202:
Control Circuits Listing 11-2. Demo
Page 203 and 204:
Control Circuits disables the outpu
Page 205 and 206:
Page 207 and 208:
Page 209 and 210:
Wireless Links 12 Wireless Links Wi
Page 211 and 212:
Wireless Links Figure 12-2. This in
Page 213 and 214:
Wireless Links Because there are th
Page 215 and 216:
Wireless Links Figure 12-4. The GP1
Page 217 and 218:
through the LEDs. If you prefer an
Page 219 and 220:
Wireless Links Figure 12-6. Using a
Page 221 and 222:
Wireless Links Figure 12-7. Using a
Page 223 and 224:
Wireless Links IREDs emit energy at
Page 225 and 226:
In the infrared link, the amount of
Page 227 and 228:
Calling Assembly-language Routines
Page 229 and 230:
into memory in the 8052-BASIC syste
Page 231 and 232:
2048h in code memory. This is becau
Page 233 and 234:
Binary value 1100 0101 Hex equivale
Page 235 and 236:
Successful assembly is a good sign,
Page 237 and 238:
statement must match the address in
Page 239 and 240:
Page 241 and 242:
Page 243 and 244:
• BASIC-52’s ON EX1 instruction
Page 245 and 246:
Page 247 and 248:
Page 249 and 250:
Running BASIC-52 from External Memo
Page 251 and 252:
14-1 for longer delays between writ
Page 253 and 254:
In Figure 3-1, tie pin 31 of U2 (EA
Page 255 and 256:
Related Products 15 Related Product
Page 257 and 258:
Finally, a compiled BASIC program u
Page 259 and 260:
Related Products Figure 15-3. Blue
Page 261 and 262:
Sources Appendix A Sources This App
Page 263 and 264:
Programming and Interfacing the 805
Page 265 and 266:
Sources Product Vendors The followi
Page 267 and 268:
Sources Electronics 123 17921 Rowla
Page 269 and 270:
Sources Micro Future 40944 Cascado
Page 271 and 272:
Sources Siemens Components 2191 Lau
Page 273 and 274:
Programs for Loading Files Appendix
Page 275 and 276:
Programs for Loading Files Listing
Page 277 and 278:
Page 279 and 280:
Page 281 and 282:
Number Systems Appendix C Number Sy
Page 283 and 284:
Number Systems This table shows the
Page 285 and 286:
Index Index A ADC, 158 - 169 addres
Page 287 and 288:
Index S sample and hold, 169 SBC, 3
show all

The Microcontroller Idea Book - Jan Axelson's Lakeview Research

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?