UPD78F0034BGC-8BS-A Renesas Electronics America, UPD78F0034BGC-8BS-A Datasheet - Page 211

• Manufacturer Part Number: UPD78F0034BGC-8BS-A
• Description: MCU 8-Bit 78K0 CISC 32KB Flash 2.5V/3.3V/5V 64-Pin LQFP
• Manufacturer: Renesas Electronics America

Specifications of UPD78F0034BGC-8BS-A

• Package: 64LQFP
• Family Name: 78K0
• Maximum Speed: 12 MHz
• Ram Size: 1 KB
• Program Memory Size: 32 KB
• Operating Supply Voltage: 2.5|3.3|5 V
• Data Bus Width: 8 Bit
• Program Memory Type: Flash
• Number Of Programmable I/os: 51
• Interface Type: 3-Wire/UART
• On-chip Adc: 8-chx10-bit
• Operating Temperature: -40 to 85 °C
• Number Of Timers: 3

8.5.2 Pulse width measurement by free-running counter and one capture register
/******************************************************************************/
/*
/*
/*
/*
/*
/*
/*
/*
/******************************************************************************/
#pragma sfr
#pragma EI
#pragma DI
#pragma interrupt INTTM01 intervalint rb2
void main(void)
{
}
/* Timer 0 interrupt function */
void intervalint()
{
/*****************************************************/
/*
/* Define variables required for interrupt here
/*
/*****************************************************/
/***********************************************************/
/*
/* Describe processing required for interrupt below
/*
/***********************************************************/
}
unsigned int data[3];
unsigned int length;
PCC = 0x0;
data[0] = 0;
data[1] = 0;
data[2] = 0;
PM7.0 = 1;
TMMK01 = 0;
PRM0 = 0b00110010;
CRC0 = 0b00000100;
TMC0 = 0b00000100;
EI();
while(1){
}
unsigned int work;
work = CR01;
data[1] = work - data[2];
data[2] = work;
data[0] = 0xffff;
Pulse width measurement example by free-running and CR01
Measurement results to be up to 16 bits and not checked for errors
data[0]: End flag
data[1]: Measurement results (pulse width)
data[2]: Previous read value
Timer 0 operation sample
while(data[0] == 0);
DI();
length = data[1];
data[0] = 0;
EI();
CHAPTER 8 16-BIT TIMER/EVENT COUNTER 0
User’s Manual U14046EJ5V0UD
/* Data area */
/* Set high-speed operation mode */
/* Set port */
/* Set P70 as input */
/* Set interrupt */
/* Cancel INTTM01 interrupt mask */
/* Set timer 0 */
/* Both rising and falling edges for TI00 */
/* Count clock is fx/2^6
/* Set CR01 to capture register */
/* Start in free-run mode */
/* Dummy loop */
/* Wait for measurement completion */
/* Prohibit interrupt for exclusive operation */
/* Read measurement results */
/* Clear end flag */
/* Exclusive operation completed */
/* Read capture value */
/* Calculate and update interval */
/* Update read value */
/* Set measurement completion flag */
*/
*/
*/
*/
*/
*/
*/
*/
*/
*/
*/
*/
*/
*/
*/
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