DSP56309EVM Freescale Semiconductor, DSP56309EVM Datasheet - Page 195

• Manufacturer Part Number: DSP56309EVM
• Description: KIT EVALUATION FOR XC56309
• Manufacturer: Freescale Semiconductor
• Type: DSPr

Specifications of DSP56309EVM

• Contents: Module Board, Installation Guide, Power Supply, Cable, Software and more
• Description/function: Audio DSPs
• Product: Audio Modules
• For Use With/related Products: DSP56309
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

9.2 Operation
This section discusses the following timer basics:
9.2.1 Timer After Reset
A hardware
Register for each timer, thus configuring each timer as a GPIO. A timer is active only if the timer
enable bit 0 (TCSR[TE]) in the specific timer TCSR is set.
9.2.2 Timer Initialization
To initialize a timer, do the following:
Freescale Semiconductor
1.
2.
Reset
Initialization
Exceptions
Ensure that the timer is not active either by sending a reset or clearing the TCSR[TE]
bit.
Configure the control register (TCSR) to set the timer operating mode. Set the interrupt
enable bits as needed for the application.
RESET
GDB
TIO
Control/Status
Timer Control
CLK/2
Register
signal or software reset instruction clears the Timer Control and Status
Logic
24
9
Prescaler CLK
TCSR
Figure 9-2. Timer Module Block Diagram
2
24
DSP56309 User’s Manual, Rev. 1
Register
Load
24
TLR
Counter
24
Timer interrupt/DMA request
Register
Count
24
TCR
24
24
Compare
Register
=
24
24
TCPR
Operation
9-3