ST7538Q STMicroelectronics, ST7538Q Datasheet - Page 19

• Manufacturer Part Number: ST7538Q
• Description: IC TXRX FSK POWER LINE 44-TQFP
• Manufacturer: STMicroelectronics
• Type: Transceiverr

Specifications of ST7538Q

• Number Of Drivers/receivers: 1/1
• Voltage - Supply: 4.75 V ~ 5.25 V
• Mounting Type: Surface Mount
• Package / Case: 44-TQFP Exposed Pad, 44-eTQFP, 44-HTQFP, 44-VQFP
• For Use With: 497-5484 - BOARD EVAL ST7538 PWR LINE TXRX
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Protocol: -
• Other names: 497-5525

ST7538Q
The UART interface allows to connect an UART compatible device instead SPI interface
allows to connect an SPI compatible device. The allowed combinations of Host
Interface/ST7538Q Mains Access are:
Table 9. Host Interface / ST7538Q mains access combinations
1. Received Data more stable than in Asynchronous Mains Access
Figure 3.
ST7538Q allows to interface the Host Controller using a five line interface (RxD,TxD,RxTx,
CLR/T, & REG_DATA) in case of Synchronous mains access or using a 3 line interface
(RxD,TxD & RxTx) in Asynchronous mains access. Since Control Register is not accessible
in Asynchronous mode, in this case REG_DATA pin can be tied to GND.
interface type
Host Device
UART
UART
SPI
SPI
Host Controller
Synchronous and asynchronous ST7538Q/Host controller interfaces
UART/Asynchronous
UART/SPI pin
Data Interface
“1”
“1”
“0”
“0”
ST7538Q
RxD
TxD
RxTx
CLR/T
REG_DATA
Communication
Transmission
Transmission
Reception
Reception
mode
Host Controller
SPI/Synchronous
Asynchronous
Data Interface
D03IN1415
X
X
Functional description
Mains access
ST7538Q
RxD
TxD
RxTx
CLR/T
REG_DATA
Synchronous
X
X
X
(1)
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