STA5620 STMicroelectronics, STA5620 Datasheet - Page 16

• Manufacturer Part Number: STA5620
• Description: IC RF FRONT END RECEIVER 32VFQFP
• Manufacturer: STMicroelectronics

Specifications of STA5620

• Modulation Or Protocol: GPS
• Current - Receiving: 19mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 2.5 V ~ 3.3 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-VFQFN
• Pin Count: 32
• Screening Level: Industrial
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Frequency: -
• Applications: -
• Sensitivity: -
• Memory Size: -
• Data Rate - Maximum: -
• Lead Free Status / Rohs Status: Compliant

SPI bus protocol
6
6.1
6.2
6.3
6.4
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SPI bus protocol
The SPI port is used for data exchange between STA5620 and a GPS base band. The SPI
port is controlled by four pins SPI_CLK, SPI_DI, SPI_DO and SPI_CS/. These pins are
inputs only, except for SPI_DO, the data output. The SPI Bus protocol is based on a 2-phase
transfer made of an address cycle and a data cycle.
The two functions in the bus interface layer are:
Figure 3.
Figure 4.
SPI_CS/
This package pin provides the frame and CS/ connection for the serial interface (SPI). This
pin will always be an input.
SPI_CLK
This package pin provides the clock connection for the serial interface (SPI). This pin will
always be an input.
SPI_DI
This package pin provides the data input connection for the serial interface (SPI). This pin
will always be an input.
SPI_DO
This package pin provides the data output connection for the serial interface (SPI). This pin
will always be an output.
CS/
SCLK
SDI
SDO
CS/
SCLK
SDI
SDO
SPI byte write
SPI byte read
A7
A7
A6
A6
A5
A5
A4
A4
A3
A3
A2
A2
A1
A1
A0
A0
D7
D7
D6
D6
D5
D5
D4
D4
D3
D3
D2
D2
D1
D1
D0
D0
AC00327
AC00326
STA5620