NEC PD17062 Manuale Utente Pagina 48
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PD17062
7. ARITHMETIC LOGIC UNIT (ALU) BLOCK
7.1 OVERVIEW
Fig. 7-1 is an overview of the ALU block.
As shown in Fig. 7-1, the ALU block consists of the ALU, temporary storage registers A and B, program
status word, decimal conversion circuit, and data memory address controller.
The ALU performs arithmetic and logic operations on the 4-bit data in the data memory and performs
discrimination, comparison, rotation, and transfer.
Fig. 7-1 Overview of the ALU Block
Data memory
Data bus
Program status
word
Address
controller
Temporary
storage
register A
Temporary
storage
register B
Indexing memory
pointer
Detecting a carry,
borrow, or zero
Setting decimal
calculation or result
storage
ALU
• Arithmetic operation
• Logic operation
• Bit discrimination
• Comparative
discrimination
• Rotation
• Transfer
Decimal conversion
- MOS INTEGRATED CIRCUIT 1
- ORDERING INFORMATION 2
- FUNCTION OVERVIEW 2
- PIN CONFIGURATION (TOP VIEW) 3
- PD17062GC-×××-3BE 4
- BLOCK DIAGRAM 5
- 1. PINS 11
- RESET signal (except for P1C) 14
- A/D Converter 15
- High on-state 15
- P0B3/HSCNT 16
- P0B2/TMIN 16
- (Hysteresis input) 17
- 2. PROGRAM MEMORY (ROM) 18
- 3. PROGRAM COUNTER (PC) 25
- 4. STACK 26
- DD is applied 28
- 5. DATA MEMORY (RAM) 29
- R, (r)) ← (m) 42
- Row address 43
- Discrimi 50
- R and mC 51
- 8. SYSTEM REGISTER (SYSREG) 54
- 2-b0, 7BH b3), of 57
- Comparison 59
- Transfer 59
- Example 1. ADD03H,11H 61
- Specifies the source 61
- 0 b3 b2 b1 b0 66
- 9. REGISTER FILE (RF) 67
- Peripheral hardware 70
- StackTimerInterrupt 70
- C bus method 72
- (only for 2-wire method) 72
- 2) (SPb0) 75
- 9.3 CE (07H, b0) 76
- NC pin and VSYNC pin 80
- 0 INTNC pin 87
- 1 Clock timer 87
- 2 VSYNC pin 87
- 3 Serial interface 87
- 10. DATA BUFFER (DBF) 88
- 0 to bit6.) 95
- Peripheral 100
- 11. INTERRUPT 106
- BANK PSW 107
- NC pin) 108
- NC pin) can be selected 108
- Serial interface 01H 109
- INTNC pin 04H 109
- Timer 03H 109
- VSYNC pin 02H 109
- NC pin), each type of 111
- NC pin) is used 114
- (a) Hardware priorities 115
- (b) Software priorities 115
- 0 of the 116
- 3 b2 b1 b0 b3 b2 b1 b0 121
- SYNC pin 121
- Active edges of interrupt 122
- SYNC pinINTNC pin 122
- System register restoration 131
- Interrupt permission 131
- 12. TIMER 133
- 2/TMIN pin 134
- 2/TMIN pin by 5 or 6 134
- CHECK < tSET 138
- SET < error < tCHECK 140
- CHECK + tTIMER < tSET 142
- Interrupt pending 149
- Input latch 153
- DD is turned on 155
- 0 at address 07H) 155
- 14. RESET 171
- Reset signal 173
- (b) At clock-stop 179
- (c) When VDD rises from 0 V 179
- During this period 182
- DD is dropped 183
- DD or by the CE pin, as 184
- DD is turned on, they 184
- Operation stopped 185
- 15. GENERAL-PURPOSE PORT 189
- 3 b2 b1 b0 191
- Note Nothing is mapped to b 193
- 3, P0A2 pins) 194
- 3, P0B2, P0B1, P0B0 pins) 194
- 3, P1B2, P1B1, P1B0 pins) 194
- 3, P1C2, P1C1 pins) 194
- 1, P0A0 pins) 194
- At reset 195
- 3, P0D2, P0D1, P0D0 pins) 198
- 3, P0C2, P0C1, P0C0 pins) 199
- 3, P1A2, P1A1, P1A0 pins) 199
- 16. SERIAL INTERFACE 201
- Remark × : Don’t care 202
- Remark ×: Don’t care 203
- 3 is used as an SO pin 205
- 1/SCL pin for 206
- Bit position b3 b2 b1 b0 207
- 6789123456789 208
- SCL, SCK 208
- Bit counter 208
- Flag name SBACK SIO0NWT 209
- SIO0WRQ1 SIO0WRQ0 209
- 17. D/A CONVERTER 217
- 6 b5 b4 b3 b2 b1 b0 218
- 3 b2 b0b1 223
- N” of the 226
- (2) When fN is leading fr 227
- (4) When fN is lower than fr 227
- Upon reset 229
- (PLLUL flag = 1) 230
- 19. A/D CONVERTER 233
- REF = VDD × 234
- DD = 5 V 234
- Flowchart 238
- 20. IMAGE DISPLAY CONTROLLER 240
- Blank (black) 241
- Background (TV screen) 241
- Sample program 244
- 01 234 5 6789AB 249
- 800001 400 249
- ID field Data field 250
- VRAM column address 250
- 7 b6 b5 b4 b3 b2 b1 b0 252
- 0 BANK0 0800H-0BFFH 255
- 1 BANK1 0C00H-0F7FH 255
- 14 and b13 of control data) 258
- 10 corresponding 259
- 10 to b7 of the control data) 259
- 6 to b3 of the control data) 260
- 6 corresponding 260
- 2 to b0 of the control data) 261
- 7 b6 b5 b4 b3 b2 b1 b0 264
- 3 b2 b1 b0 b3 b2 b1 b0 264
- IDC image area 265
- SYNC and 267
- SYNC signals supplied to the 267
- SYNC signal that comes 267
- 20.8 SAMPLE PROGRAMS 268
- 269
- 22. INSTRUCTION SETS 277
- The reserved 282
- 23.1 SYSTEM REGISTER 282
- 23.2 DATA BUFFER 282
- 23.3 PORT REGISTER 283
- 23.4 REGISTER FILES 284
- NC interrupt request flag 285
- 23.6 OTHERS 286
- 64 PIN PLASTIC QFP ( 14) 290
- SMD Surface Mount 291
- Technology Manual 291
- APPENDIX DEVELOPMENT TOOLS 292
- Cautions on CMOS Devices 295
- M4 94.11 296
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