ade7518 Analog Devices, Inc., ade7518 Datasheet - Page 106

• Manufacturer Part Number: ade7518
• Description: Single-phase Energy Measurement Ic With 8052 Mcu, Rtc, And Lcd Driver
• Manufacturer: Analog Devices, Inc.

ADE7518
Table 122. Serial Port Buffer SFR (SBUF, 0x99)
Bit
7 to 0
Table 123. Enhanced Serial Baud Rate Control SFR (SBAUDT, 0x9E)
Bit
7
6
5
4, 3
2 to 0
Table 124. UART Timer Fractional Divider SFR (SBAUDF, 0x9D)
Bit
7
6
5
4
3
2
1
0
Mnemonic
SBUF
Mnemonic
OWE
FE
BE
SBTH[1:0]
DIV[2:0]
Mnemonic
UARTBAUDEN
SBAUDF.5
SBAUDF.4
SBAUDF.3
SBAUDF.2
SBAUDF.1
SBAUDF.0
Default
0
0
0
0
0
0
0
Default
0
Default
0
0
0
0
000
Description
Serial Port Data Buffer.
Description
Overwrite Error. This bit is set when new data is received and RI = 1. It indicates that SBUF was not
read before the next character was transferred in, causing the prior SBUF data to be lost. Write a 0 to
this bit to clear it.
Frame Error. This bit is set when the received frame does not have a valid stop bit. This bit is read
only and is updated every time a frame is received.
Break Error. This bit is set whenever the receive data line (Rx) is low for longer than a full transmission
frame, which is the time required for a start bit, eight data bits, a parity bit, and half a stop bit. This
bit is updated every time a frame is received.
Extended divider ratio for baud rate setting, as shown in Table 125.
Binary Divider. See Table 125.
DIV[2:0]
000
001
010
011
100
101
110
111
Description
UART Baud Rate Enable. Set to enable UART timer to generate the baud rate.
When this bit is set, PCON[7] (SMOD), T2CON[4] (TCLK), and T2CON[5] (RCLK) are ignored.
Cleared to let the baud rate be generated as per a standard 8052.
Not implemented, write don’t care.
UART Timer Fractional Divider Bit 5.
UART Timer Fractional Divider Bit 4.
UART Timer Fractional Divider Bit 3.
UART Timer Fractional Divider Bit 2.
UART Timer Fractional Divider Bit 1.
UART Timer Fractional Divider Bit 0.
Result
Divide by 1.
Divide by 2.
Divide by 4.
Divide by 8.
Divide by 16.
Divide by 32.
Divide by 64.
Divide by 128.
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