Public Version
General-Purpose Timers
www.ti.com
16.2.1.1 GP Timers Features
The following are the main features of the GP timers controllers:
•
L4 slave interface support:
–
32-bit data bus width
–
32-/16-bit access supported
–
8-bit access not supported
–
10-bit address bus width
–
Burst mode not supported
–
Write nonposted transaction mode supported
•
Interrupts generated on overflow, compare, and capture
•
Free-running 32-bit upward counter
•
Compare and capture modes
•
Autoreload mode
•
Start/stop mode
•
Programmable divider clock source (2
n
with n = [0:8])
•
Dedicated input trigger for capture mode and dedicated output trigger/PWM signal
•
Dedicated output signal for general-purpose using GPTi_GPOCFG signal
•
On-the-fly read/write register (while counting)
•
1-ms tick with 32,768 Hz functional clock generated (only GPTIMER1, GPTIMER2, and GPTIMER10)
16.2.2 GP Timers Environment
16.2.2.1 GP Timers External System Interface
Four of the 11 GP timers can send or receive stimulus to/from the external (off-chip) system. In the device,
however, only GPTIMER8 through GPTIMER11 are configured to output a PWM pulse or receive an
external event signal used as a trigger to capture the current timer count. GPTIMER1 is also configured to
receive an event trigger input (GPT1_EVENT_CAPTURE) tied to the internal 32-kHz clock. This event
signal gauges the system clock input; it detects its frequency among 12, 13, 16.8, 19.2, 26, or 38.4 MHz.
shows the external system interface for the GP timers, and
describes the GP timer
inputs and outputs.
NOTE:
Software must ensure that mux mode is configured to select the gpt_x_pwm_evt (where x =
8 to 11) signal on only one pad. Other pads on which the same signal is multiplexed must be
configured in safe mode or non-gptimer mode to avoid two different pads driving the same
signal.
For more information about the gpt_8_pwm_evt through gpt11_pwm_evt I/O pad
configuration, see
, System Control Module.
2704
Timers
SWPU177N – December 2009 – Revised November 2010
Copyright © 2009–2010, Texas Instruments Incorporated
Содержание OMAP36 Series
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Страница 692: ...692 MPU Subsystem SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 1084: ...1084 IVA2 2 Subsystem SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 1990: ...1990 2D 3D Graphics Accelerator SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 2334: ...2334 Memory Subsystem SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 2700: ...2700 Memory Management Units SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 2868: ...2868 HDQ 1 Wire SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 2974: ...2974 UART IrDA CIR SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 3054: ...3054 Multichannel SPI SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 3462: ...3462 MMC SD SDIO Card Interface SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 3508: ...3508 General Purpose Interface SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 3584: ...3584 Initialization SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 3648: ...3648 Debug and Emulation SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...