ST7538Q Просмотр технического описания (PDF) - STMicroelectronics
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ST7538Q Datasheet PDF : 44 Pages
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Pin settings
ST7538Q
2.2
Pin description
Table 1. Pin description
Pin N° Name
Type
Description
1
CD_PD Digital/Output
Carrier, Preamble or Frame Header Detect Output.
"1" No Carrier, Preamble or Frame Header Detected
"0" Carrier, Preamble or Frame Header Detected
2
DVss Supply
Digital Ground
3
RxD Digital/Output
RX Data Output.
4
RxTx Digital/Input
Rx or Tx mode selection input.
with internal pull-up "1" - RX Session
"0" - TX Session
5
TxD Digital/Input
TX Data Input.
with internal pull-down
6
GND Supply
Substrate Ground (same function as PIN 41)
7
TOUT Digital/Output
TX Time Out Event Detection
"1" - Time Out Event Occurred
"0" - No Time-out Event Occurred
8
CLR/T Digital/Output
Synchronous Mains Access Clock or
Control Register Access Clock
9
BU
Digital/Output
Band in use Output.
"1" Signal within the Programmed Band
"0" No Signal within the Programmed Band
10
DVdd Supply
Digital Supply Voltage or 3.3V Voltage Regulator Output
11
MCLK Digital/Output
Master Clock Output
12
RSTO Digital/Output
Power On or Watchdog Reset Output
13 UART/SPI Digital/Input
Interface type:
with internal pull-down “0” - Serial Peripheral Interface
“1” - UART Interface
14
WD
Digital/Input
Watchdog input. The Internal Watchdog Counter is cleared on the
with internal pull-up falling edges.
15
ZCOUT Digital/Output
Zero Crossing Detection Output
16
ZCIN(1) Analog/Input
Zero Crossing AC Input.
17
NC
Floating
Must be connected to DVss.
18
DVss Supply
Digital Ground
19
ATOP1 Power/Output
Power Line Driver Output
20
PAVss Supply
Power Analog Ground
21
ATOP2 Power/Output
Power Line Driver Output
22
PAVCC Supply
Power Supply Voltage
23
CL(2) Analog/Input
Current Limiting Feedback.
A resistor between CL and AVss sets the PLI Current Limiting Value
An integrated 80pF filtering input capacitance is present on this pin
24
ATO Analog/Output
Small Signal Analog Transmit Output
6/44
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