CY14C064I_13 Datasheet, PDF (3/40 Pages) Cypress Semiconductor – 64-Kbit (8 K x 8) Serial (I2C) nvSRAM with Real Time Clock

CY14C064I
CY14B064I
CY14E064I
Pinout
Figure 1. 16-pin SOIC pinout
NC 1
VRTCbat ₂
Xout ₃
Xin ₄
WP 5
A0 6
V_{RTCcap 7}
V_SS
8
16 V_CC
15 INT/SQW
14
Top View ₁₃
not to scale
12
V_CAP
A2
SDA
11 ^SCL
10 A1
9 HSB
Pin Definitions
Pin Name I/O Type
Description
SCL
SDA
Input
Clock: Runs at speeds up to a maximum of f_SCL.
Input/Output I/O: Input/output of data through I²C interface.
Output: Is open-drain and requires an external pull-up resistor.
WP
A2–A0
Input
Input
Write Protect: Protects the memory from all writes. This pin is internally pulled LOW and hence can be
left open if not connected.
Slave Address: Defines the slave address for I²C. These pins are internally pulled LOW and hence can
be left open if not connected.
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 (External pull-up resistor connection optional).
Input: Hardware STORE implemented by pulling this pin LOW externally.
V_CAP
Power supply AutoStore capacitor: Supplies power to the nvSRAM during power loss to STORE data from the SRAM
to nonvolatile elements. If not required, AutoStore must be disabled and this pin left as No Connect. It
must never be connected to ground.
V_RTCcap[3] Power supply Capacitor backup for RTC: Left unconnected if V_RTCbat is used.
V_RTCbat[3] Power supply Battery backup for RTC: Left unconnected if V_RTCcap is used.
X_out[3]
Output Crystal output connection
X_in[3]
Input Crystal input connection
[3]
INT/SQW
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 Square Wave mode, the user may
select a frequency of 1 Hz, 512 Hz, 4096 Hz, or 32768 Hz to be used as a continuous output.
NC
No connect No connect. This pin is not connected to the die.
V_SS
Power supply Ground
V_CC
Power supply Power supply
Note
3. Left unconnected if RTC feature is not used.
Document Number: 001-68169 Rev. *F
Page 3 of 40