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CY14C256PA Datasheet(PDF) 3 Page - Cypress Semiconductor |
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CY14C256PA Datasheet(HTML) 3 Page - Cypress Semiconductor |
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3 / 43 page  CY14C256PA CY14B256PA CY14E256PA Document Number: 001-65281 Rev. *E Page 3 of 43 Pinout Figure 1. 16-pin SOIC pinout INT/SQW WP V CAP 1 2 3 4 5 6 7 8 9 10 11 12 13 NC 16 15 14 V CC SO SI SCK CS HSB HOLD Top View not to scale VRTCbat Xout Xin V RTCcap V SS Pin Definitions Pin Name I/O Type Description CS Input Chip select: Activates the device when pulled LOW. Driving this pin HIGH puts the device in low power standby mode. SCK Input Serial clock: Runs at speeds up to a maximum of fSCK. Serial input is latched at the rising edge of this clock. Serial output is driven at the falling edge of the clock. SI Input Serial input: Pin for input of all SPI instructions and data. SO Output Serial output: Pin for output of data through SPI. WP Input Write Protect: Implements hardware write protection in SPI. HOLD Input HOLD pin: Suspends Serial Operation. HSB Input/Output Hardware STORE Busy: Output: Indicates busy status of nvSRAM when LOW. After each Hardware and Software STORE operation HSB is driven HIGH for a short time (tHHHD) with standard output high current and then a weak internal pull-up resistor keeps this pin HIGH (external pull-up resistor connection optional). Input: Hardware STORE implemented by pulling this pin LOW externally. VCAP Power supply AutoStore capacitor. Supplies power to the nvSRAM during power loss to STORE data from the SRAM to nonvolatile elements. If AutoStore is not needed, this pin must be left as No Connect. It must never be connected to ground. VRTCcap [2] Power supply Capacitor backup for RTC: Left unconnected if VRTCbat is used. VRTCbat [2] Power supply Battery backup for RTC: Left unconnected if VRTCcap is used. Xout[2] Output Crystal output connection Xin[2] Input Crystal input connection INT/SQW [2] Output Interrupt output/calibration/square wave. Programmable to respond to the clock alarm, the watchdog timer, and the power monitor. Also programmable to either active HIGH (push or pull) or LOW (open drain). In calibration mode, a 512 Hz square wave is driven out. In the square wave mode, you may select a frequency of 1 Hz, 512 Hz, 4,096 Hz, or 32,768 Hz to be used as a continuous output. NC No connect No connect. This pin is not connected to the die. VSS Power supply Ground VCC Power supply Power supply Note 2. Left unconnected if RTC feature is not used. |
Similar Part No. - CY14C256PA_12 |
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Similar Description - CY14C256PA_12 |
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