timers-002
GPTi_FCLK
GPTi_ICLK
GP timer (x11)
32 kHz
12/13/19.2/26/38.4 MHz
IVA2.2
subsystem
L4
interconnect
gpt11_pwm_evt
11
Interrupt
controller
Modem
interrupt
handler
MPU
subsystem
Interrupt
controller
4
4
11
GPTi_IRQ
GPT11_PWM_OUT
GPT11_EVENT_CAPTURE
GPT11_GPOCFG
gpt10_pwm_evt
GPT10_PWM_OUT
GPT10_EVENT_CAPTURE
GPT10_GPOCFG
gpt9_pwm_evt
GPT9_PWM_OUT
GPT9_EVENT_CAPTURE
GPT9_GPOCFG
gpt8_pwm_evt
GPT8_PWM_OUT
GPT8_EVENT_CAPTURE
GPT8_GPOCFG
GPT1_EVENT_CAPTURE
GPTi_SWAKEUP
GPTi_RST
PRCM
11
11
11
Device
sys_32k
Public Version
www.ti.com
General-Purpose Timers
16.2 General-Purpose Timers
16.2.1 GP Timers Overview
The device has 11 GP timers: GPTIMER1 through GPTIMER11.
Each timer can be clocked from either the system clock (12, 13, 16.8, 19.2, 26, or 38.4 MHz) or the
32-kHz clock. The selection of the clock source is made at the power, reset, clock management (PRCM)
module level. For more information, see
, Clocking, Reset, and Power-Management
Scheme.
GPTIMER1 has its GPT1_EVENT_CAPTURE pin tied to the 32-kHz clock and can be used to gauge the
system clock input; it detects its frequency among 12, 13, 16.8, 19.2, 26, or 38.4 MHz.
Each timer can provide an interrupt to the microprocessor unit (MPU) subsystem. In addition, GPTIMER5
through GPTIMER8 also have interrupts connected to the IVA2.2 subsystem.
GPTIMER1, GPTIMER2, and GPTIMER10 include specific functions to generate accurate tick interrupts to
the operating system. GPTIMER8 through GPTIMER11 are connected to external pins by their PWM
output or their event capture input pin (for external timer triggering).
shows an overview of the
GP timers.
Figure 16-2. GP Timers Overview
2703
SWPU177N – December 2009 – Revised November 2010
Timers
Copyright © 2009–2010, Texas Instruments Incorporated