MC56F8257MLH Freescale Semiconductor, MC56F8257MLH Datasheet - Page 169

• Manufacturer Part Number: MC56F8257MLH
• Description: DSC 64K FLASH 60MHZ 64-LQFP
• Manufacturer: Freescale Semiconductor
• Series: 56F8xxxr

Specifications of MC56F8257MLH

• Core Processor: 56800E
• Core Size: 16-Bit
• Speed: 60MHz
• Connectivity: CAN, I²C, LIN, SCI, SPI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 54
• Program Memory Size: 64KB (32K x 16)
• Program Memory Type: FLASH
• Ram Size: 4K x 16
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 16x12b, D/A 1x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 64-LQFP
• Product: DSCs
• Processor Series: 56800E
• Core: 56800E
• Device Million Instructions Per Second: 60 MIPs
• Maximum Clock Frequency: 60 MHz
• Number Of Programmable I/os: 54
• Data Ram Size: 8 KB
• Operating Supply Voltage: 3.3 V
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12 bit, 8 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

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6.6.2.4 Gated-Count Mode
If CTRL[CM] is set to '011', the counter will count while the selected secondary input
signal is high. This mode is used to time the duration of external events. If the selected
input is inverted by setting SCTRL[IPS] (input polarity select), then the counter will
count while the selected secondary input is low.
Example: 6.6.2.4.1 Capture Duration of External Pulse
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Freescale Semiconductor
//
//
//
//
void Pulse_Init(void)
{
}
//
//
//
//
//
//
//
//
void Pulse1_Init(void)
{
}
/* TMRA1_CTRL: CM=0,PCS=3,SCS=0,ONCE=0,LENGTH=0,DIR=0,Co_INIT=0,OM=0 */
setReg(TMRA1_CTRL,0x0600);
/* TMRA1_SCTRL: TCF=0,TCFIE=0,TOF=0,TOFIE=0,IEF=0,IEFIE=0,IPS=0,INPUT=0,
setReg(TMRA1_SCTRL,0x00);
setReg(TMRA1_CNTR,0x00);
setReg(TMRA1_LOAD,0x00);
setRegBitGroup(TMRA1_CTRL,CM,0x02);
/* TMRA1_CTRL: CM=0,PCS=8,SCS=1,ONCE=0,LENGTH=0,DIR=0,Co_INIT=0,OM=0 */
setReg(TMRA1_CTRL,0x1080);
/* TMRA1_SCTRL: TCF=0,TCFIE=0,TOF=0,TOFIE=0,IEF=0,IEFIE=0,IPS=0,INPUT=0,
setReg(TMRA1_SCTRL,0x00);
setReg(TMRA1_CNTR,0x00);
setReg(TMRA1_LOAD,0x00);
setRegBitGroup(TMRA1_CTRL,CM,0x03);
This example uses TMRA1 to count pulse (actually counts rising edges of the pulse)
This example uses TMRA1 to determine the duration of an external pulse.
The IP_bus clock is used as the primary counter. If the duration of the
from an external source (TA3).
external pulse is longer than 0.001 seconds one of the other IP_bus clock
dividers can be used. If the pulse duration is longer than 0.128 seconds
an external clock source will have to be used as the primary clock source.
(See Processor Expert PulseAccumulator bean.)
(See Processor Expert PulseAccumulator bean.)
Capture_Mode=0,MSTR=0,EEOF=0,VAL=0,FORCE=0,OPS=0,OEN=0 */
Capture_Mode=0,MSTR=0,EEOF=0,VAL=0,FORCE=0,OPS=0,OEN=0 */
MC56F825x/4x Reference Manual, Rev. 2, 10/2010
/* Set up mode */
/* Reset counter register */
/* Reset load register */
/* Run counter */
/* Reset counter register */
/* Reset load register */
/* Run counter */
/* Set up mode */
Preliminary
Chapter 6 Quad Timer (TMR)
169