ST7540TR STMicroelectronics, ST7540TR Datasheet - Page 34

• Manufacturer Part Number: ST7540TR
• Description: IC TXRX FSK POWER LINE 28-TSSOP
• Manufacturer: STMicroelectronics
• Type: Transceiverr

Specifications of ST7540TR

• Number Of Drivers/receivers: 1/1
• Voltage - Supply: 5 V ~ 9 V
• Mounting Type: Surface Mount
• Package / Case: 28-TSSOP Exposed Pad, 28-eTSSOP, 28-HTSSOP
• For Use With: 497-5485 - BOARD EVAL ST7540 PWR LINE TXRX
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Protocol: -
• Lead Free Status / Rohs Status: Compliant
• Other names: 497-5528-2

Functional description
Table 12. Control register functions
34/44
12 to 13
15 to 16 Output Clock
14
17
18
19
Frame Length
Voltage Level
Recognition
Interfacing
Function
Detection
method
Header
Freeze
Output
Mains
Count
Mode
Preamble detection
without conditioning
Preamble detection
with conditioning
Carrier detection
without conditioning
Carrier detection
with conditioning
Asynchronous
Synchronous
Clock OFF
Disabled
Disabled
Disabled
Enabled
Enabled
Enabled
16 MHz
8 MHz
4 MHz
Value
Bit 13
Bit 16
0
0
1
1
0
0
1
1
Selection
Bit 14
Bit 17
Bit 18
Bit 19
0
1
0
1
0
1
0
1
Bit 12
Bit 15
0
1
0
1
0
1
0
1
Note
Preamble detection
notification on CD_PD Line
CLR/T and RxD signal always
present In UART Mode
(UART/SPI pin set to 1) this
configuration is not allowed.
Preamble Detection
notification on CD_PD Line.
CLR/T and RxD line are
forced to "0" when Preamble
has not been detected or PLL
is in Unlock condition. In
UART Mode (UART/SPI pin
set to 1) this configuration is
not allowed.
Carrier detection notification
on CD_PD Line
CLR/T and RxD signal always
present
Carrier detection notification
on CD_PD Line
CLR/T Line is forced to “0”
and RxD Line is forced to “0”
or “1” (according the
UART/SPI pin level) when
carrier is not detected
Active only if extended control
register is enable (Bit 21=”1”)
Active only if extended control
register is enable (Bit 21=”1”)
Active only if header
recognition function (Bit
18=”1”) and extended control
register (Bit 21=”1”)
are enable
Asynchronous
conditioning
detection
Disabled
Disabled
Disabled
Default
without
Carrier
4 MHz
ST7540