SAK-C868-1SR BA Infineon Technologies, SAK-C868-1SR BA Datasheet - Page 51

• Manufacturer Part Number: SAK-C868-1SR BA
• Description: IC MCU 8BIT 8KB RAM TSSOP-38-1
• Manufacturer: Infineon Technologies
• Series: C5xx/C8xxr

Specifications of SAK-C868-1SR BA

• Core Processor: C800
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: UART/USART
• Peripherals: Brown-out Detect/Reset, PWM, WDT
• Number Of I /o: 18
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: RAM
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 5x8b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 38-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Other names: SAKC8681SRBAXT; SP000014357

For Brushless-DC motors there is a special mode (MSEL6x = ’1000b’) which is
triggered by a change of the Hall-inputs (CCPOSx). This mode shows the capabilities of
the CCU6. Here T12’s channel 0 acts in capture function, channel 1 and 2 in compare
function (without output modulation) and the multi-channel-block is used to trigger the
output switching together with a possible modulation of T13.
After the detection of a valid Hall edge the T12 count value is captured to channel 0
(representing the actual motor speed) and resets the T12. When the timer reaches the
compare value in channel 1, the next multi-channel state is switched by triggering the
shadow transfer of bit field MCMP (if enabled in bit field SWEN). This trigger event can
be combined with several conditions which are necessary to implement a noise filtering
(correct Hall event) and to synchronize the next multi-channel state to the modulation
sources (avoiding spikes on the output lines). This compare function of channel 1 can be
used as a phase delay for the position input to the output switching which is necessary
if a sensorless back-EMF technique is used instead of Hall sensors. The compare value
in channel 2 can be used as a time-out trigger (interrupt) indicating that the motors
destination speed is far below the desired value which can be caused by a abnormal load
change. In this mode the modulation of T12 has to be disabled (T12MODENx = ’0’).
Figure 0-2
Data Sheet
CCPOS0
CCPOS1
CCPOS2
COUT6y
CC60
CC61
CC62
CC6x
Timer T12 Brushless-DC Mode (MSEL6x = 1000)
phase delay
act. speed
timeout
1
0
1
event resets
1
0
0
capture
T12
act. speed
1
1
0
ch0 gets
captured
value for
51
0
1
0
0
1
1
for phase delay
ch1 compare
0
1
0
ch2 compare
for timeout
V 1.0, 2003-05
C868