SPEAR-09-H022_06 STMICROELECTRONICS [STMicroelectronics], SPEAR-09-H022_06 Datasheet - Page 62

• Manufacturer Part Number: SPEAR-09-H022_06
• Description: SPEAr Head200 ARM 926, 200K customizable eASIC gates, large IP portfolio SoC
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

General purpose timers
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General purpose timers
SPEAr Head200 has 4 GPTs, connected as APB Bus slaves.
A GPT is constituted by 2 channels and each one consists of a programmable 16 bit counter
and a dedicated 8 bit timer clock prescaler. The programmable 8 bit prescaler unit performs
a clock division by 1, 2, 4, 8, 16, 32, 64, 128, and 256, allowing a frequency range from 3.96
Hz to 48 MHz.
Two modes of operation are available for each GPT:
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The current timer counter value could be read from a register.
Auto Reload Mode. When the timer is enabled, the counter is cleared and starts
incrementing. When it reaches the compare register value, an interrupt source is
activated, the counter first is automatically cleared and then restarts incrementing.
The process is repeated until the timer is disabled.
Single Shot Mode. When the timer is enabled, the counter is cleared and starts
incrementing. When it reaches the compare register value, an interrupt source is
activated, the counter stopped and the timer disabled.
SPEAR-09-H022