SCP1000 PCB3 VTI Technologies, SCP1000 PCB3 Datasheet - Page 23

• Manufacturer Part Number: SCP1000 PCB3
• Description: SENSOR I2C 30-120KPA PCB
• Manufacturer: VTI Technologies
• Series: SCP1000r

Specifications of SCP1000 PCB3

• Pressure Type: Absolute
• Operating Pressure: 4.35 ~ 17.40 PSI, 30 ~ 120 kPa
• Output: Digital
• Voltage - Supply: 2.4 V ~ 3.3 V
• Termination Style: Surface Mount
• Operating Temperature: -20°C ~ 70°C
• Package / Case: PCB Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 551-1044

4
4.1 SPI Interface
4.1.1
VTI Technologies Oy
www.vti.fi
Serial Interfaces
SPI frame format
Communication between SCP1000 sensor and master controller is based on serial data transfer
and dedicated interrupt line (DRDY-pin). Depending on operation mode an external trigger pin
(TRIG) can also be used in serial interfacing. Two different serial interfaces are available for
SCP1000 sensor: SPI and TWI (very similar to I
enabled by pre-programming in the factory. SCP1000 acts as a slave on both SPI and TWI bus.
The SPI interface is a full duplex 4 wire serial interface. The connection between the µC and
SCP1000 is done using MOSI, MISO, SCK and CSB. CSB selects the chip on multi-chip SPI bus,
SCK is the serial data clock, MOSI is the data line from master to slave (Master Out Slave In) and
MISO is data line from slave to master (Master In Slave Out). SCP1000 is configured to SPI slave
mode (see Figure 8).
The SCP1000 SPI frame format is presented in Figure 9 below.
Figure 9. SPI frame format for two 8 bit words.
Each SPI communication frame contains two or three 8 bit words: the first word defines the register
address (6 bits wide, bits [A5:A0] in Figure 9) followed by the type of access (‘0’ = Read or
‘1’ = Write) and one zero bit (bit 0, LSB). The following word(s) contain the data being read or
written. The MSB of the words are sent first. Bits from MOSI line are sampled in on the rising edge
of SCK and bits to MISO line are latched out on falling edge of SCK.
The CSB line must stay low during the entire frame accesses, i.e. between the bytes. If the CSB
line state changes to high, the access is terminated. The CSB has to be pulled up after each
communication frame.
Figure 8. SPI master slave configuration.
Master µC
Doc.Nr. 8260800.08
Subject to changes
2
SCP1000
C). However, only one interface per product is
SCP1000 Series
Rev.0.08
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