ST7540TR STMicroelectronics, ST7540TR Datasheet - Page 18

• 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 8. ST7540 synthesized frequencies
6.4
18/44
76
ST7540 Mains access
ST7540 can access the Mains in two different ways:
●
●
The choice between the two types of access can be performed by means of Control
Register bit 14(see
Reception Mode (for how to set the communication Mode, see
In data transmission mode:
●
●
In data reception mode:
●
●
1200
2400
4800
600
Synchronous access
Asynchronous access
Synchronous Mains access: on clock signal provided by ST7540 (CLR/T line) rising
edge, data transmission line (TxD line) value is read and sent to the FSK Modulator.
ST7540 manages the Transmission timing according to the BaudRate Selected.
Asynchronous Mains access: data transmission line (TxD line) value enters directly to
the FSK Modulator. The Host Controller manages the Transmission timing (CLR/T line
should be neglected).
Synchronous Mains access: on clock signal recovered by a PLL from ST7540 (CLR/T
line) rising edge, value on FSK Demodulator is read and put to the data reception line
(RxD line). ST7540 recovers the bit timing timing according to the BaudRate Selected.
Asynchronous Mains access: Value on FSK Demodulator is sent directly to the data
reception line (RxD line). The Host Controller recovers the communication timing
(CLR/T line should be neglected).
0.5
0.5
0.5
--
1
1
1
1
Table
75684
75684
75358
75358
74870
74870
73568
12) and affects the ST7540 data flow in Transmission Mode as in
76335
76335
76660
76660
77148
77148
78451
132.5
1200
2400
4800
600
Section
0.5
0.5
0.5
--
1
1
1
1
6.5).
132161
132161
131836
131836
131348
131348
130046
132813
132813
133138
133138
133626
133626
134928
ST7540