CY14B512P_13 Datasheet, PDF (3/35 Pages) Cypress Semiconductor – 512-Kbit (64 K x 8) Serial (SPI) nvSRAM with Real Time Clock

CY14B512P
Pinouts
Figure 1. 16-pin SOIC pinout
NC 1
VRTCbat ₂
Xout ₃
Xin ₄
WP 5
HOLD 6
V_{RTCcap 7}
V_SS
8
16 V_CC
15 INT
14
Top View ₁₃
not to scale
12
V_CAP
SO
SI
11 ^SCK
10 CS
9 HSB
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 maximum of f_SCK. 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 (t_HHHD) with standard output high current and then a weak
internal pull-up resistor keeps this pin HIGH (an external pull-up resistor connection is optional).
Input: Hardware STORE implemented by pulling this pin LOW externally.
V_CAP
V_RTCcap[2]
V_RTCbat[2]
Xout^[2]
Xin^[2]
[2]
INT
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.
Power supply Capacitor backup for RTC. Left unconnected if V_RTCbat is used.
Power supply Battery backup for RTC. Left unconnected if V_RTCcap is used.
Output Crystal output connection. Drives crystal on start up.
Input Crystal input connection. For 32.768 kHz crystal.
Output
Interrupt output. Programmable to respond to the clock alarm, the watchdog timer, and the power
monitor. It is also programmable to either active HIGH (push or pull) or LOW (open drain).
NC
No connect No connect. This pin is not connected to the die.
V_SS Power supply Ground.
V_CC Power supply Power supply (2.7 V to 3.6 V).
Note
2. Left unconnected if RTC feature is not used.
Document Number: 001-53872 Rev. *I
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