CY8CTST200-48LTXIT Cypress Semiconductor Corp, CY8CTST200-48LTXIT Datasheet - Page 67

• Manufacturer Part Number: CY8CTST200-48LTXIT
• Description: IC MCU 32K FLASH 48-QFN
• Manufacturer: Cypress Semiconductor Corp
• Series: TrueTouch™r

Specifications of CY8CTST200-48LTXIT

• Applications: Touchscreen Controller
• Core Processor: M8C
• Program Memory Type: FLASH (32 kB)
• Controller Series: CY8CT
• Ram Size: 2K x 8
• Interface: I²C, SPI, UART/USART, USB
• Number Of I /o: 38
• Voltage - Supply: 1.8 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 48-QFN
• Processor Series: CY8CTxx2xx
• Core: M8C
• Data Bus Width: 8 bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

8. Internal Low Speed Oscillator (ILO)
This chapter briefly explains the Internal Low Speed Oscillator (ILO) and its associated register. The Internal Low Speed
Oscillator produces a 32 kHz or 1 kHz clock. For a quick reference of all PSoC registers in address order, refer to the
Register
Reference chapter on page
187.
8.1
Architectural Description
The Internal Low Speed Oscillator (ILO) is an oscillator with a nominal frequency of 32 kHz or 1 kHz. It is used to generate
sleep wakeup interrupts and watchdog resets. This oscillator is also used as a clocking source for the digital blocks. This
block operates with a small internal bias current and produces an output clock of either 1 kHz or 32 kHz, configurable by the
user. The ILO is trimmed for 32 kHz in production devices. There is no trim for 1 kHz, hence, high variation is expected from
nominal value.
The block operates by charging a capacitor with a current, to a reference level. Once reached, the capacitor is discharged to
ground. This process repeats to provide the oscillator (half) period.
PSoC CY8CTMG20x and CY8CTST200 TRM, Document No. 001-53603 Rev. *C
67
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