ST7538Q STMicroelectronics, ST7538Q Datasheet - Page 35

• 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
5.11
Detection method and Rx Sensitivity in UART mode
When ST7538Q is running in UART mode (by forcing UART/SPI pin to “1”) the Control
Register Function “Detection method” differs from SPI mode as indicated in the
Table 12. Control register functions in UART mode
UART mode provides also a third level of Receiving sensitivity in addition to two levels select
able by Control Register (see
session the sensitivity is forced to BU threshold (this condition suppresses the Control
Register setting).
12 to
13
Function
Detection
Method
Not Allowed
Not Allowed
Carrier detection
without
conditioning
Carrier detection
with conditioning
Value
Table
11). By setting to “1” the TxD pin during a receiving
Bit 13
Selection
0
0
1
1
Bit 12
0
1
0
1
This configuration
should be avoided
because it could cause
an unpredictable
behavior of the device
CLR/T Line is forced to
because it could cause
Notification on CD_PD
CLR/T and RxD signal
Notification on CD_PD
behavior of the device
UART/SPI pin level)
“0” and RxD Line is
when Carrier is not
should be avoided
forced to “0” or “1”
This configuration
Carrier Detection
Carrier Detection
an unpredictable
always Present
(according the
detected
Note
Line
Line
Functional description
conditioning
Table
detection
Default
without
Carrier
12:
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