MPD78C14 datasheet(10/373 Pages) NEC

10 / 373 page

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6.3

Timer/Event Counter Operation ....................................................................................

6.3.1

Interval timer mode .............................................................................................................

6.3.2

Event counter mode ............................................................................................................

6.3.3

Frequency measurement mode ..........................................................................................

6.3.4

Pulse width measurement mode .......................................................................................

6.3.5

Programmable rectangular-wave output mode ..................................................................

6.3.6

Timer/event counter program examples ............................................................................

CHAPTER 7 SERIAL INTERFACE FUNCTIONS .............................................................................

107

7.1

Serial Interface Configuration ........................................................................................

107

7.2

Serial Mode Registers .....................................................................................................

109

7.2.1

Serial mode high register (SMH) ........................................................................................

109

7.2.2

Serial mode low register (SML) ..........................................................................................

112

7.2.3

Serial mode register initialization ........................................................................................

114

7.3

Serial Interface Operation ...............................................................................................

114

7.3.1

Asynchronous mode ............................................................................................................

114

7.3.2

Synchronous mode ..............................................................................................................

121

7.3.3

I/O interface mode ..............................................................................................................

123

7.3.4

Example of serial interface program ..................................................................................

127

CHAPTER 8 ANALOG/DIGITAL CONVERTER FUNCTIONS .......................................................

137

8.1

Analog/Digital Converter Configuration.......................................................................

137

8.2

A/D Channel Mode Register (ANM) ..............................................................................

140

8.3

Analog/Digital Converter Operation .............................................................................

142

8.3.1

Scan mode ...........................................................................................................................

142

8.3.2

Select mode .........................................................................................................................

143

8.3.3

A/D converter operation control method ...........................................................................

144

8.3.4

Input voltage and conversion results .................................................................................

145

8.3.5

Example of analog/digital converter program ....................................................................

146

CHAPTER 9 INTERRUPT CONTROL FUNCTIONS .......................................................................

153

9.1

Interrupt Control Circuit Configuration ........................................................................

154

9.2

External Interrupt Sampling ...........................................................................................

158

9.3

Non-Maskable Interrupt Operation ...............................................................................

160

9.4

Maskable Interrupt Operation ........................................................................................

163

9.5

Interrupt Operation by SOFTI Instruction ....................................................................

167

9.6

Interrupt Wait Time .........................................................................................................

168

9.7

Multiple Interrupts ...........................................................................................................

169

CHAPTER 10 CONTROL FUNCTIONS ...........................................................................................

171

10.1 Standby Functions ...........................................................................................................

171

10.1.1

HALT mode ..........................................................................................................................

171

10.1.2

HALT mode release .............................................................................................................

172

10.1.3

Software STOP mode .........................................................................................................

174

10.1.4

Software STOP mode release ............................................................................................

175

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