LM3S6952 Datasheet, PDF (51/626 Pages) Texas Instruments – Stellaris LM3S6952 Microcontroller

Stellaris® LM3S6952 Microcontroller
Therefore, as a multi-shot timer, repeated over and over, it fires every N+1 clock pulse, where N is
any value from 1 to 0x00FF.FFFF. So, if the tick interrupt is required every 100 clock pulses, 99
must be written into the RELOAD. If a new value is written on each tick interrupt, so treated as single
shot, then the actual count down must be written. For example, if a tick is next required after 400
clock pulses, 400 must be written into the RELOAD.
Bit/Field
31:24
Name
reserved
23:0
RELOAD
Type
RO
R/W
Reset
0
-
Description
Software should not rely on the value of a reserved bit. To
provide compatibility with future products, the value of a reserved
bit should be preserved across a read-modify-write operation.
Reload
Value to load into the SysTick Current Value Register when the
counter reaches 0.
SysTick Current Value Register
Use the SysTick Current Value Register to find the current value in the register.
Bit/Field
31:24
Name
reserved
23:0
CURRENT
Type
RO
W1C
Reset Description
0 Software should not rely on the value of a reserved bit. To provide
compatibility with future products, the value of a reserved bit should be
preserved across a read-modify-write operation.
- Current Value
Current value at the time the register is accessed. No read-modify-write
protection is provided, so change with care.
This register is write-clear. Writing to it with any value clears the register
to 0. Clearing this register also clears the COUNTFLAG bit of the SysTick
Control and Status Register.
SysTick Calibration Value Register
The SysTick Calibration Value register is not implemented.
April 05, 2010
51
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