Pinouts – Cypress CY14B101P User Manual
Page 2
PRELIMINARY
CY14B101P
Document #: 001-44109 Rev. *B
Page 2 of 32
Pinouts
Figure 1. Pin Diagram - 16-Pin SOIC
Table 1. 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 25 MHz. All inputs are latched at the rising edge
of this clock. Outputs are 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: A weak internal pull up keeps this pin pulled HIGH. If not used, this pin is
left as No Connect.
Output: Indicates busy status of nvSRAM when LOW.
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 GND.
V
RTCcap
Power Supply
Capacitor Backup for RTC. Left unconnected if V
RTCbat
is used.
V
RTCbat
Power Supply
Battery Backup for RTC. Left unconnected if V
RTCcap
is used.
Xout
Output
Crystal Output connection. Drives crystal on start up.
Xin
Input
Crystal Input connection. For 32.768 kHz crystal.
INT
Output
Interrupt Output. 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).
NC
No Connect
No Connect. This pin is not connected to the die.
GND
Power Supply
Ground
V
CC
Power Supply
Power Supply (2.7-3.6V)
INT
GND
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