z8f1601 ZiLOG Semiconductor, z8f1601 Datasheet - Page 110

• Manufacturer Part Number: z8f1601
• Description: Z8 Encore!? Microcontroller With Flash Memory And 10-bit A/d Converter
• Manufacturer: ZiLOG Semiconductor

Table 57. UARTx Baud Rate Low Byte Register (UxBRL)
PS017609-0803
RESET
FIELD
ADDR
BITS
R/W
UART Baud Rate Divisor Value (BRG)
UART Baud Rate Error (%)
R/W
7
1
The UART data rate is calculated using the following equation:
UART Baud Rate (bits/s)
For a given UART data rate, the integer baud rate divisor value is calculated using the fol-
lowing equation:
The baud rate error relative to the desired baud rate is calculated using the following equa-
tion:
For reliable communication, the UART baud rate error must never exceed 5 percent.
Table 58 provides information on data rate errors for popular baud rates and commonly
used crystal oscillator frequencies.
R/W
6
1
R/W
5
1
=
=
100
--------------------------------------------------------------------------------------------- -
16 UART Baud Rate Divisor Value
R/W
F47H and F4FH
4
1
´
Z8F640x/Z8F480x/Z8F320x/Z8F240x/Z8F160x
´
System Clock Frequency (Hz)
æ
è
BRL
=
Actual Data Rate Desired Data Rate
------------------------------------------------------------------------------------------------ -
Round
R/W
3
1
æ
è
Desired Data Rate
System Clock Frequency (Hz)
--------------------------------------------------------------------------- -
16 UART Data Rate (bits/s)
´
R/W
2
1
–
R/W
1
1
Z8 Encore!
R/w
0
1
UART
ö
ø
ö
ø
®
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