ST7538Q STMicroelectronics, ST7538Q Datasheet - Page 17

• 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
5.4
Table 7. ST7538Q synthesized frequencies
ST7538Q mains access
ST7538Q 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
in Reception Mode (for how to set the communication Mode, see
In Data Transmission Mode:
Frequency
Carrier
(KHz)
Synchronous access
Asynchronous access
–
–
72
76
Synchronous Mains access: on clock signal provided by ST7538Q (CLR/T line)
rising edge, data transmission line (TxD line) value is read and sent to the FSK
Modulator. ST7538Q 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).
Baud
Rate
1200
2400
4800
1200
2400
4800
600
600
Deviation
Table
0.5
0.5
0.5
0.5
0.5
0.5
--
--
1
1
1
1
1
1
1
1
11) and affects the ST7538Q data flow in Transmission Mode as
Frequency [Hz]
(Clock=16MHz)
71777
71777
71452
71452
70801
70801
69661
75684
75684
75358
75358
74870
74870
73568
“1”
Exact
72266
72266
72591
72591
73242
73242
74382
76335
76335
76660
76660
77148
77148
78451
“0”
Frequen
Carrier
(KHz)
132.5
110
cy
Baud
Rate
1200
2400
4800
1200
2400
4800
600
600
Deviation
Section 5.5 on page
Functional description
0.5
0.5
0.5
0.5
0.5
0.5
--
--
1
1
1
1
1
1
1
1
109701 110352
109701 110352
109375 110677
109375 110677
108724 111165
108724 111165
107585 112467
132161 132813
132161 132813
131836 133138
131836 133138
131348 133626
131348 133626
130046 134928
Frequency [Hz]
(Clock=16MHz)
“1”
Exact
“0”
18).
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