NEC PD78052 - Port 12; P120 to P127 Block Diagram

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148

CHAPTER 6 PORT FUNCTIONS

P-ch

PORT

PUO

Selector

PUO12

Output Latch

(P120 to P127)

PM120-PM127

Internal bus

P120/RTP0

P127/RTP7

6.2.10 Port 12

This is an 8-bit input/output port with output latches. Input mode/output mode can be specified bit-wise by means

of port mode register 12 (PM12). When pins P120 to P127 are used as input port pins, an on-chip pull-up resistor

can be used as an 8-bit unit by means of pull-up resistor option register H (PUOH).

Alternate function includes real-time output.

RESET input sets the input mode.

Figure 6-17 shows a block diagram of port 12.

Figure 6-17. P120 to P127 Block Diagram

PUO : Pull-up resistor option register

PM : Port mode register

RD : Port 12 read signal

WR : Port 12 write signal

Main Page

Default Chapter6
- Regional Information6
- Major Revisions in this Edition7
- Table of Contents17
CHAPTER 1 GENERAL ( PD78054 Subseries)37
- Features37
- Applications38
- Ordering Information38
- Quality Grade39
- Pin Configuration (Top View)40
- Series Expansion43
- Block Diagram45
- Outline of Function46
  - Mask Options of Mask ROM Versions48
- Differences between Standard Quality Grade Products and (A) Products48
- Mask Options48
CHAPTER 2 GENERAL ( PD78054Y Subseries)49
- Features49
- Applications50
- Ordering Information50
- Quality Grade50
- Pin Configuration (Top View)51
- Series Expansion54
- Block Diagram56
- Outline of Function57
- Mask Options58
CHAPTER 3 PIN FUNCTION ( PD78054 Subseries)59
- Pin Function List59
  - Normal Operating Mode Pins59
  - PROM Programming Mode Pins (PROM Versions Only)63
- Description of Pin Functions64
- Input/Output Circuits and Recommended Connection of Unused Pins71
  - Pin Input/Output Circuit Types71
  - Pin Input/Output Circuit of List73
CHAPTER 4 PIN FUNCTION ( PD78054Y Subseries)75
- Pin Function List75
  - Normal Operating Mode Pins75
  - PROM Programming Mode Pins (PROM Versions Only)79
- Description of Pin Functions80
- Input/Output Circuits and Recommended Connection of Unused Pins87
  - Pin Input/Output Circuit Types87
  - Pin Input/Output Circuit of List89
Chapter 5 Cpu Architecture91
- Memory Spaces91
- Processor Registers109
- Instruction Address Addressing118
- Operand Address Addressing121
Chapter 6 Port Functions129
- Port Functions129
- Port Types129
- Port Functions ( PD78054 Subseries)130
- Port Functions ( PD78054Y Subseries)132
- Port Configuration134
- Port Function Control Registers150
- Port Function Operations156
- Selection of Mask Option157
Chapter 7 Clock Generator159
- Clock Generator Functions159
- Clock Generator Configuration159
  - Block Diagram of Clock Generator160
- Clock Generator Control Register161
- System Clock Oscillator165
  - Main System Clock Oscillator165
  - Examples of Incorrect Oscillator Connection166
    - Scaler168
    - When no Subsystem Clocks Are Used168
- Clock Generator Operations169
- Changing System Clock and CPU Clock Settings171
  - Time Required for Switchover between System Clock and CPU Clock171
  - System Clock and CPU Clock Switching Procedure173
Chapter 8 16-Bit Timer/Event Counter175
- Outline of Timers Incorporated in the PD78054, 78054Y Subseries175
  - Timer/Event Counter Operations176
- 16-Bit Timer/Event Counter Functions177
  - Bit Timer/Event Counter Interval Times177
  - Bit Timer/Event Counter Square-Wave Output Ranges178
- 16-Bit Timer/Event Counter Configuration179
- 16-Bit Timer/Event Counter Control Registers182
- 16-Bit Timer/Event Counter Operations191
- 16-Bit Timer/Event Counter Operating Precautions212
Chapter 9 8-Bit Timer/Event Counters 1 and 2215
- 8-Bit Timer/Event Counters 1 and 2 Functions215
- 8-Bit Timer/Event Counters 1 and 2 Configurations220
  - Bit Timer/Event Counters 1 and 2 Block Diagram221
    - Block Diagram of 8-Bit Timer/Event Counter Output Control Circuit 1222
    - Block Diagram of 8-Bit Timer/Event Counter Output Control Circuit 2222
- 8-Bit Timer/Event Counters 1 and 2 Control Registers223
- 8-Bit Timer/Event Counters 1 and 2 Operations228
- Cautions on 8-Bit Timer/Event Counters 1 and 2238
  - Event Counter Operation Timing239
  - Timing after Compare Register Change During Timer Count Operation239
Chapter 10 Watch Timer241
- Watch Timer Functions241
  - Interval Timer Interval Time241
- Watch Timer Configuration242
- Watch Timer Control Registers242
- Watch Timer Operations246
  - Watch Timer Operation246
  - Interval Timer Operation246
Chapter 11 Watchdog Timer247
- Watchdog Timer Functions247
  - Watchdog Timer Runaway Detection Times247
  - Interval Times248
- Watchdog Timer Configuration249
  - Watchdog Timer Block Diagram249
- Watchdog Timer Control Registers250
  - Timer Clock Select Register 2 Format251
  - Watchdog Timer Mode Register Format252
- Watchdog Timer Operations253
  - Watchdog Timer Operation253
  - Watchdog Timer Runaway Detection Times253
    - Interval Timer Interval Time254
    - Interval Timer Operation254
Chapter 12 Clock Output Control Circuit255
- Clock Output Control Circuit Functions255
  - Remote Controlled Output Application Example255
- Clock Output Control Circuit Configuration256
  - Clock Output Control Circuit Block Diagram256
- Clock Output Function Control Registers257
  - Timer Clock Select Register 0 Format258
  - Port Mode Register 3 Format259
Chapter 13 Buzzer Output Control Circuit261
- Buzzer Output Control Circuit Functions261
- Buzzer Output Control Circuit Configuration261
- Buzzer Output Control Circuit Block Diagram261
  - Buzzer Output Function Control Registers262
- Timer Clock Select Register 2 Format263
- Port Mode Register 3 Format264
Chapter 14 A/D Converter265
- A/D Converter Functions265
- A/D Converter Configuration265
  - A/D Converter Block Diagram266
- A/D Converter Control Registers269
- A/D Converter Operations273
- A/D Converter Cautions278
Chapter 15 D/A Converter281
- D/A Converter Functions281
- D/A Converter Configuration282
  - D/A Converter Block Diagram282
- D/A Converter Control Registers284
  - D/A Converter Mode Register Format284
- Operations of D/A Converter285
- Cautions Related to D/A Converter286
  - Use Example of Buffer Amplifier286
CHAPTER 16 SERIAL INTERFACE CHANNEL 0 ( PD78054 Subseries)287
- Differences between Channels 0, 1, and 2287
- Serial Interface Channel 0 Functions288
  - Serial Bus Interface (SBI) System Configuration Example289
- Serial Interface Channel 0 Configuration290
  - Serial Interface Channel 0 Block Diagram291
- Serial Interface Channel 0 Control Registers294
- Serial Interface Channel 0 Operations301
CHAPTER 17 SERIAL INTERFACE CHANNEL 0 ( PD78054Y Subseries)341
- Differences between Channels 0, 1, and 2341
- Serial Interface Channel 0 Functions342
- Serial Interface Channel 0 Configuration344
  - Serial Interface Channel 0 Block Diagram345
  - Serial Interface Channel 0 Interrupt Request Signal Generation347
- Serial Interface Channel 0 Control Registers348
- Serial Interface Channel 0 Operations356
Chapter 18 Serial Interface Channel 1393
- Serial Interface Channel 1 Functions393
- Serial Interface Channel 1 Configuration394
  - Serial Interface Channel 1 Block Diagram395
- Serial Interface Channel 1 Control Registers397
- Serial Interface Channel 1 Operations405
Chapter 19 Serial Interface Channel 2439
- Serial Interface Channel 2 Functions439
- Serial Interface Channel 2 Configuration440
  - Serial Interface Channel 2 Block Diagram441
  - Baud Rate Generator Block Diagram442
- Serial Interface Channel 2 Control Registers444
- Serial Interface Channel 2 Operation452
Chapter 20 Real-Time Output Port477
- Real-Time Output Port Functions477
- Real-Time Output Port Configuration478
- Real-Time Output Port Control Registers480
Chapter 21 Interrupt and Test Functions483
- Interrupt Function Types483
- Interrupt Sources and Configuration484
  - Interrupt Source List484
  - Basic Configuration of Interrupt Function486
- Interrupt Function Control Registers488
- Interrupt Servicing Operations497
- Test Functions507
Chapter 22 External Device Expansion Function511
- External Device Expansion Functions511
- External Device Expansion Function Control Register516
- External Device Expansion Function Timing518
- Example of Connection with Memory523
  - Connection Example of PD78054 and Memory523
Chapter 23 Standby Function525
- Standby Function and Configuration525
- Standby Function Operations527
Chapter 24 Reset Function533
- Reset Function533
- Timing of Reset Input in STOP Mode by RESET Input534
- Timing of Reset Due to Watchdog Timer Overflow534
- Timing of Reset Input by RESET Input534
- Hardware Status after Reset535
Chapter 25 Rom Correction537
- ROM Correction Functions537
- ROM Correction Configuration537
  - Block Diagram of ROM Correction537
  - Correction Address Registers 0 and 1 Format538
- ROM Correction Control Registers539
  - Correction Control Register Format539
- ROM Correction Application540
- ROM Correction Example543
- Program Execution Flow544
  - Program Transition Diagram (When One Place Is Corrected)544
  - Program Transition Diagram (When Two Places Are Corrected)545
- Cautions on ROM Correction546
Chapter 26 Pd78P054, 78P058547
- Pd78P054, 78P058547
- Differences between PD78P054, 78P058 and Mask ROM Versions547
- Differences between PD78P054 and 78P058548
  - Examples of Memory Size Switching Register Settings ( PD78P054)549
  - Memory Size Switching Register Format ( PD78P054)549
- Memory Size Switching Register ( PD78P054)549
  - Examples of Memory Size Switching Register Settings ( PD78P058)550
- Memory Size Switching Register ( PD78P058)550
  - Memory Size Switching Register Format ( PD78P058)550
- Internal Expansion RAM Size Switching Register551
  - Value Set to the Internal Expansion RAM Size Switching Register551
- PROM Programming552
- Erasure Procedure ( PD78P054KK-T and 78P058KK-T Only)559
- Opaque Film Masking the Window ( PD78P054KK-T and 78P058KK-T Only)559
- Screening of One-Time PROM Versions559
Chapter 27 Instruction Set561
- Legends Used in Operation List562
- Operation List564
- Instructions Listed by Addressing Type572
Appendix A Differences between Pd78054, 78054Y Subseries and Pd78058F, 78058Fy Subseries577
- A-1. Major Differences between PD78054, 78054Y Subseries and PD78058F, 78058FY Subseries578
APPENDIX A DIFFERENCES between Μpd78054, 78054Y SUBSERIES and579
Appendix B Development Tools579
- B-1. Development Tool Configuration580
- Language Processing Software582
  - B.2.1 Hardware584
  - B.2.2 Software584
- PROM Writing Tools584
  - Hardware584
  - Software584
    - B.3 Debugging Tools585
    - B.3.1 Hardware585
- Debugging Tools585
- OS for IBM PC589
- Upgrading Former In-Circuit Emulators for 78K/0 Series to IE-78001-R-A589
Appendix C Embedded Software593
Appendix D Register Index595
- Register Index595
Appendix E Revision History599

NEC PD78052 - Port 12; P120 to P127 Block Diagram

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