Electronic Components Datasheet Search |
|
CY8C201A0-LDX2I Datasheet(PDF) 9 Page - Cypress Semiconductor |
|
CY8C201A0-LDX2I Datasheet(HTML) 9 Page - Cypress Semiconductor |
9 / 38 page CY8C201A0 Document Number: 001-54607 Rev. *G Page 9 of 38 Operating Modes of I2C Commands Normal Mode In normal mode of operation, the acknowledgment time is optimized. The timings remain approximately the same for different configurations of the slave. To reduce the acknowledgment times in normal mode, the registers 0x06–0x09, 0x0C, 0x0D, 0x10–0x17, 0x50, 0x51, 0x57–0x60, 0x7E are given only read access. Write to these registers can be done only in setup mode. Setup Mode All registers have read and write access (except those which are read only) in this mode. The acknowledgment times are longer compared to normal mode. When CapSense scanning is disabled (command code 0x0A in command register 0xA0), the acknowledgment times can be improved to values similar to the normal mode of operation. Device Operation Modes CapSense Express devices are configured to operate in any of the following three modes to meet different power consumption requirements ■ Active Mode ■ Periodic Sleep Mode ■ Deep Sleep Mode Active Mode In the active mode, all the device blocks including the CapSense sub system are powered. Typical active current consumption of the device across the operating voltage range is 1.5 mA. Periodic Sleep Mode Sleep mode provides an intermediate power operation mode. It is enabled by configuring the corresponding device registers (0x7E, 0x7F). The device goes into sleep after there is no event for stay awake counter (Reg 0x80) number of sleep intervals. The device wakes up on sleep interval and It scans the capacitive sensors before going back to sleep again. If any sensor is active then the device wakes up. The device can also wake up from sleep mode with a GPIO interrupt. The following sleep intervals are supported in CapSense Express. The sleep interval is configured through registers. ■ 1.95 ms (512 Hz) ■ 15.6 ms (64 Hz) ■ 125 ms (8 Hz) ■ 1s (1 Hz) Deep Sleep Mode Deep sleep mode provides the lowest power consumption because there is no operation running. All CapSense scanning is disabled during this mode. In this mode, the device is woken up only using an external GPIO interrupt. A sleep timer interrupt cannot wake up a device from deep sleep mode. This is treated as a continuous sleep mode without periodic wakeups. Refer to the application note CapSense Express Power and Sleep Considerations – AN44209 for details on different sleep modes. To get the lowest power during this mode the sleep timer frequency should be set to 1 Hz. Sleep Control Pin The devices require a dedicated sleep control pin to enable reliable I2C communication in case any sleep mode is enabled. This is achieved by pulling the sleep control pin Low to wake up the device and start I2C communication. The sleep control pin can be configured on any of the GPIO. Interrupt Pin to Master To inform the master of any button press, a GPIO can be configured as interrupt output and all CapSense buttons can be connected to this GPIO with OR logic operator. This can be configured using the software tool. |
Similar Part No. - CY8C201A0-LDX2I |
|
Similar Description - CY8C201A0-LDX2I |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |