ST10F280 STMicroelectronics, ST10F280 Datasheet - Page 65

• Manufacturer Part Number: ST10F280
• Description: MCU 16BIT 512K FLASH MAC 208-PBG
• Manufacturer: STMicroelectronics
• Series: ST10r

Specifications of ST10F280

• Core Processor: ST10
• Core Size: 16-Bit
• Speed: 40MHz
• Connectivity: ASC, CAN, EBI/EMI, SSC
• Peripherals: POR, PWM, WDT
• Number Of I /o: 143
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• Ram Size: 18K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 32x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 208-PBGA
• Processor Series: ST10F28x
• Core: ST10
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

11.2.1.4 - Single Shot Mode
Single shot mode is selected by setting the
respective bit PSx in register XPWMCON1 to ‘1’.
This mode is available for XPWM channels 2
and 3.
In this mode the timer XPTx of the respective
XPWM channel is started via software and is
counting up until it reaches the value in the asso-
ciated period shadow register. Upon the next
count pulse the timer is cleared to 0000h and
stopped via hardware, i.e. the respective PTRx bit
is cleared. The XPWM output signal is switched to
high level when the timer contents are equal to or
greater than the contents of the pulse width
shadow register. The signal is switched back to
low level when the respective timer is cleared, i.e.
is below the pulse width shadow register. Thus
starting a XPWM timer in single shot mode pro-
duces one single pulse on the respective port pin,
provided that the pulse width value is between
0000h and the period value. In order to generate a
Figure 23 : Operation and Output Waveform in Single Shot Mode
XPTx Count
Value
XPWx Pulse
Width=4
XPTx Count
Value
XPWx Pulse
Width=4
XPPx
Period=7
XPPx
Period=7
by Software
Set PTRx
0
0
1
1
t
D
2
2
3
3
4
4
Write PWx value to PTx
5
5
Pulse has started :
by Hardware
PTx stopped
Retrigger after
PTRx Reset
6
6
7
LSR
4
t
W
further pulse, the timer has to be started again via
software by setting bit PTRx (see Figure 23).
After starting the timer (i.e. PTRx = ‘1’) the output
pulse may be modified via software. Writing to
timer XPTx changes the positive and/or negative
edge of the output signal, depending on whether
the pulse has already started (i.e. the output is
high) or not (i.e. the output is still low). This (multi-
ple) re-triggering is always possible while the
timer is running, i.e. after the pulse has started
and before the timer is stopped.
Loading counter XPTx directly with the value in
the respective XPPx shadow register will abort the
current PWM pulse upon the next clock pulse
(counter is cleared and stopped by hardware).
By setting the period (XPPx), the timer start value
(XPTx) and the pulse width value (XPWx) appro-
priately, the pulse width (tw) and the optional
pulse delay (td) may be varied in a wide range.
5
6
7
for Next Pulse
by Software
Set PTRx
Trigger before Pulse has started :
0
Write PWx value to PTx;
Shortens Delay Time t
1
2
0
t
D
3
1
4
4
5
5
t
W
6
6
D
ST10F280
LSR
7
7
65/186