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UPD780138 Datasheet(PDF) 12 Page - NEC

No. de Pieza. UPD780138
Descripción  8-Bit Single-Chip Microcontrollers
Descarga  558 Pages
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Fabricante  NEC [NEC]
Página de inicio  http://www.nec.com/
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UPD780138 Datasheet(HTML) 12 Page - NEC

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User’s Manual U16228EJ2V0UD
12
5.4.1
X1 oscillator ..................................................................................................................................126
5.4.2
Subsystem clock oscillator............................................................................................................126
5.4.3
When subsystem clock is not used...............................................................................................129
5.4.4
Ring-OSC oscillator ......................................................................................................................129
5.4.5
Prescaler.......................................................................................................................................129
5.5
Clock Generator Operation ..................................................................................................... 130
5.6
Time Required to Switch Between Ring-OSC Clock and X1 Input Clock........................... 137
5.7
Time Required for CPU Clock Switchover............................................................................. 138
5.8
Clock Switching Flowchart and Register Setting ................................................................. 139
5.8.1
Switching from Ring-OSC clock to X1 input clock.........................................................................139
5.8.2
Switching from X1 input clock to Ring-OSC clock.........................................................................140
5.8.3
Switching from X1 input clock to subsystem clock ........................................................................141
5.8.4
Switching from subsystem clock to X1 input clock ........................................................................142
5.8.5
Register settings ...........................................................................................................................143
CHAPTER 6 16-BIT TIMER/EVENT COUNTERS 00 AND 01......................................................... 144
6.1
Functions of 16-Bit Timer/Event Counters 00 and 01........................................................... 144
6.2
Configuration of 16-Bit Timer/Event Counters 00 and 01 .................................................... 145
6.3
Registers Controlling 16-Bit Timer/Event Counters 00 and 01 ........................................... 150
6.4
Operation of 16-Bit Timer/Event Counters 00 and 01........................................................... 160
6.4.1
Interval timer operation .................................................................................................................160
6.4.2
PPG output operations .................................................................................................................163
6.4.3
Pulse width measurement operations ...........................................................................................166
6.4.4
External event counter operation ..................................................................................................174
6.4.5
Square-wave output operation......................................................................................................177
6.4.6
One-shot pulse output operation...................................................................................................179
6.5
Cautions for 16-Bit Timer/Event Counters 00 and 01 ........................................................... 184
CHAPTER 7 8-BIT TIMER/EVENT COUNTERS 50 AND 51........................................................... 187
7.1
Functions of 8-Bit Timer/Event Counters 50 and 51............................................................. 187
7.2
Configuration of 8-Bit Timer/Event Counters 50 and 51 ...................................................... 189
7.3
Registers Controlling 8-Bit Timer/Event Counters 50 and 51 ............................................. 191
7.4
Operations of 8-Bit Timer/Event Counters 50 and 51........................................................... 196
7.4.1
Operation as interval timer............................................................................................................196
7.4.2
Operation as external event counter .............................................................................................198
7.4.3
Square-wave output operation......................................................................................................199
7.4.4
PWM output operation ..................................................................................................................200
7.5
Cautions for 8-Bit Timer/Event Counters 50 and 51 ............................................................. 204
CHAPTER 8 8-BIT TIMERS H0 AND H1 .......................................................................................... 205
8.1
Functions of 8-Bit Timers H0 and H1 ..................................................................................... 205
8.2
Configuration of 8-Bit Timers H0 and H1............................................................................... 205
8.3
Registers Controlling 8-Bit Timers H0 and H1 ...................................................................... 209
8.4
Operation of 8-Bit Timers H0 and H1 ..................................................................................... 214
8.4.1
Operation as interval timer/square-wave output ...........................................................................214


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