Electronic Components Datasheet Search |
|
CYW20734UA1KFFB3G Datasheet(PDF) 11 Page - Cypress Semiconductor |
|
CYW20734UA1KFFB3G Datasheet(HTML) 11 Page - Cypress Semiconductor |
11 / 51 page Document Number: 002-14874 Rev. *S Page 11 of 51 CYW20734 Table 5 shows the recommended crystal specifications. 1.6.2 HID Peripheral Block The peripheral blocks of the CYW20734 all run from a single 128 kHz low-power RC oscillator. The oscillator can be turned on at the request of any of the peripherals. If the peripheral is not enabled, it shall not assert its clock request line. The keyboard scanner is a special case, in that it may drop its clock request line even when enabled, and then reassert the clock request line if a keypress is detected. 1.6.3 32 kHz Crystal Oscillator Figure 4 shows the 32 kHz XTAL oscillator with external components and Table 6 lists the oscillator’s characteristics. It is a standard Pierce oscillator using a comparator with hysteresis on the output to create a single-ended digital output. The hysteresis was added to eliminate any chatter when the input is around the threshold of the comparator and is ~100 mV. This circuit can be operated with a 32 kHz or 32.768 kHz crystal oscillator or be driven with a clock input at similar frequency. The default component values are: R1 = 10 MΩ and C1 = C2 = ~10 pF. The values of C1 and C2 are used to fine-tune the oscillator. Figure 4. 32 kHz Oscillator Block Diagram Table 5. Reference Crystal Electrical Specifications Parameter Conditions Minimum Typical Maximum Unit Nominal frequency – – 24.000 – MHz Oscillation mode – Fundamental – Frequency tolerance @25°C – ±10 – ppm Tolerance stability over temp @0°C to +70°C – ±10 – ppm Equivalent series resistance – – – 50 Load capacitance – – 12 – pF Operating temperature range – 0 – +70 °C Storage temperature range – –40 – +125 °C Drive level – – – 200 μW Aging – – – ±10 ppm/year Shunt capacitance – – – 2 pF C2 C1 R1 32.768 kHz XTAL |
Similar Part No. - CYW20734UA1KFFB3G |
|
Similar Description - CYW20734UA1KFFB3G |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | 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 |