CY3271-EXP1 Cypress Semiconductor Corp, CY3271-EXP1 Datasheet - Page 23

• Manufacturer Part Number: CY3271-EXP1
• Description: KIT CYFI ENV SENSING
• Manufacturer: Cypress Semiconductor Corp
• Series: PSoC, CyFir
• Type: PSoC, FirstTouchr

Specifications of CY3271-EXP1

• Frequency: 2.4GHz
• Silicon Manufacturer: Cypress
• Silicon Core Number: CY3271
• Kit Application Type: Sensing - Touch / Proximity
• Application Sub Type: Capacitive Touch
• Silicon Family Name: PSoC
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• For Use With/related Products: CY3271
• Lead Free Status / Rohs Status: Supplier Unconfirmed
• Other names: 428-2275

4.1
4.1.1
CY3271 EXP1 Environmental Sensing Kit, Spec. # 001-49259 Rev. **
4.
Firmware
Weather Station
Weather Station Interface Definition
The board interfaces to the FirstTouch RF unit using the standard hardware interface defined for
FirstTouch RF Expansion Boards. This interface is an augmented I
8 byte packets. The Weather Station board is an I
data on a virtual register interface. The eight bytes are interpreted as four 16-bit, 2's compliment data
values, each corresponding to one of the four sensors monitored by the onboard PSoC. The 16 bit
values are presented in this order:
■
■
■
■
The following sections specify the exact definition of the engineering units provided for each sensor.
In addition to the I
FirstTouch PC Bridge: Board Select and Board Ready. The Board Select line is controlled by the
Bridge and signals the PSoC on the weather station board to obtain readings. When readings are
received, the PSoC sets the Board Ready line high to indicate to the PC Bridge that the values pre-
sented are stable.
Table 4-1. Weather Station Interface Definition
Humidity
Temperature
Ambient Light
Pressure
Humidity
Temperature
Ambient light
Pressure
Field
2
C interface, the board uses two hardware signals to control interaction with the
16-bit
16-bit
16-bit
16-bit
Size
2's compliment
2's compliment
2's compliment
2's compliment
Format
2
C slave device that presents the eight bytes of
Percent relative
Degrees Celsius * 100
Lux
Inches of mercury * 100
Units
2
C interface that transmits data in
Byte Offset
0
2
4
6
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