ST7540 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
ST7540 Datasheet PDF : 44 Pages
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Pin settings
ST7540
Table 1. Pin description (continued)
N° Name
Type
Description
7 BU/THERM Digital/Output
Band in use/Thermal Shutdown event detection output.
In Rx mode:
"1" Signal within the programmed band
"0" No signal within the programmed band
In Tx mode:
"1" - Thermal Shutdown event occurred
"0" - No Thermal Shutdown event occurred
(signal not latched)
8 CLR/T Digital/Output
Synchronous mains access clock or
control register access clock
9
VDD
Supply/Power
Digital supply voltage or 3.3V voltage regulator output
10 MCLK Digital/Output
Master clock output
11 RSTO Digital/Output
Power ON or watchdog reset output
12
UART/SPI
Digital/Input
with internal pull-down
Interface type:
“0” - Serial peripheral interface
“1” - UART interface
13
WD
Digital/Input
with internal pull-up
Watchdog input. The internal watchdog counter is
cleared on the falling edges.
14 PA_IN- Analog/Input
Power line amplifier inverting input
15 PA_OUT Power/Output
Power line amplifier output
16
VSS
Supply
Power analog ground
17
VCC
Supply
Power supply voltage
18 PA_IN+ Analog/Input
Power line amplifier not inverting input
19 TX_OUT Analog/Output
Small signal analog transmit output
20
SVSS
Supply
Analog signal ground
21
X1
Analog/Output
Crystal oscillator output
22
X2
Analog/Input
Crystal oscillator input - or external clock input
23 VSENSE (1) Analog/Input
Output voltage sensing input for the voltage control loop
24
CL(2)
Analog/Input
Current limiting feedback.
A resistor between CL and SVSS sets the PLI current
limiting value. An integrated 80pF filtering input
capacitance is present on this pin.
25 RX_IN Analog/Input
Receiving analog input
26
VDC
Power
5V voltage regulator output
27
TEST1
Digital/Input
with internal pull-down
Test input. Must be connected to GND.
28 TEST2 Analog/Input
Test input. Must be connected SVSS
1. Cannot be left floating
2. Cannot be left floating
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