STA5620 STMicroelectronics, STA5620 Datasheet - Page 15

• 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

STA5620
5
5.1
5.2
5.3
5.4
Pin and I/O cells
Mode
This pin allows a choice of initial configuration of the registers at reset. This pin will always
be an input. In application this pin will be connected either LO or HI.
When it is low the chip is configured to use 16.368 MHz as reference frequency, otherwise
the reference frequency is 19.2 MHz. To use other reference frequencies the MODE bit must
be overwritten by SPI.
RF_EN
This pin provides control over the operating state of the RF and PLL sections. When it is low
those blocks are off, when high the status of the blocks depends of CHIP_EN. This pin will
always be an input.
CHIP_EN
This pin provides control over the operating state of the chip. When it is low the entire chip is
disabled and only a leakage current is present (< 10 µA). On the rising edge it provides the
SPI with a reset signal, the SPI default status depends on MODE and RF_EN pins status.
When it is high the entire chip is enabled. This pin will always be an input.
TEST_EN1, TEST_EN2 and TEST_CLK
Those PINs are for ST test only. In the application TEST_EN1 must be set LOW, TEST_EN2
must be set HIGH (V
CC
_IO) and TEST_CLK must be not connected.
Pin and I/O cells
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