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UPD789026 Datasheet(PDF) 15 Page - NEC

Part # UPD789026
Description  8-Bit Single-Chip Microcontrollers
Download  213 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD789026 Datasheet(HTML) 15 Page - NEC

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User's Manual U11919EJ3V0UM00
15
6.4.2
Operation as timer output ..........................................................................................................101
6.4.3
Capture operation......................................................................................................................102
6.4.4
16-bit timer counter 20 readout .................................................................................................103
CHAPTER 7 8-BIT TIMER/EVENT COUNTER .......................................................................................105
7.1
8-Bit Timer/Event Counter Functions.....................................................................................105
7.2
8-Bit Timer/Event Counter Configuration ..............................................................................106
7.3
8-Bit Timer/Event Counter Control Registers........................................................................107
7.4
8-Bit Timer/Event Counter Operation.....................................................................................109
7.4.1
Operation as interval timer ........................................................................................................109
7.4.2
Operation as external event counter .........................................................................................111
7.4.3
Operation as square wave output..............................................................................................112
7.5
Notes on Using 8-Bit Timer/Event Counters .........................................................................114
CHAPTER 8 WATCHDOG TIMER...........................................................................................................115
8.1
Watchdog Timer Functions.....................................................................................................115
8.2
Watchdog Timer Configuration .............................................................................................. 116
8.3
Watchdog Timer Control Registers........................................................................................117
8.4
Operation of Watchdog Timer.................................................................................................119
8.4.1
Operation as watchdog timer.....................................................................................................119
8.4.2
Operation as interval timer ........................................................................................................120
CHAPTER 9 SERIAL INTERFACE 00.....................................................................................................121
9.1
Serial Interface 00 Functions ..................................................................................................121
9.2
Serial Interface 00 Configuration ............................................................................................121
9.3
Serial Interface 00 Control Register .......................................................................................125
9.4
Serial Interface 00 Operation...................................................................................................132
9.4.1
Operation stop mode .................................................................................................................132
9.4.2
Asynchronous serial interface (UART) mode ............................................................................134
9.4.3
3-wire serial I/O mode ...............................................................................................................145
CHAPTER 10 INTERRUPT FUNCTIONS................................................................................................ 149
10.1 Interrupt Function Types.........................................................................................................149
10.2 Interrupt Sources and Configuration .....................................................................................149
10.3 Interrupt Function Control Registers .....................................................................................152
10.4 Interrupt Processing Operation ..............................................................................................158
10.4.1
Non-maskable interrupt request acceptance operation.............................................................158
10.4.2
Maskable interrupt request acceptance operation.....................................................................161
10.4.3
Nesting processing ....................................................................................................................163
10.4.4
Interrupt request reserve ...........................................................................................................165
CHAPTER 11 STANDBY FUNCTION .....................................................................................................167
11.1 Standby Function and Configuration.....................................................................................167
11.1.1
Standby function........................................................................................................................167


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