Specifications
CY14C101PA
CY14B101PA
CY14E101PA
Document Number: 001-54392 Rev. *N Page 3 of 44
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 V iew
not to scale
V
RTCbat
X
out
X
in
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 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 (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 AutoStore is not needed, this pin must be left as No Connect. It must never
be connected to ground.
V
RTCcap
[2]
Power supply Capacitor backup for RTC: Left unconnected if V
RTCbat
is used.
V
RTCbat
[2]
Power supply Battery backup for RTC: Left unconnected if V
RTCcap
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.
V
SS
Power supply Ground
V
CC
Power supply Power supply
Note
2. Left unconnected if RTC feature is not used.