z8f0822 ZiLOG Semiconductor, z8f0822 Datasheet - Page 112
z8f0822
Manufacturer Part Number
z8f0822
Description
High Performance 8-bit Microcontrollers
Manufacturer
ZiLOG Semiconductor
Datasheet
1.Z8F0822.pdf
(264 pages)
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PS022517-0508
UART Baud Rate Generator
The UART Baud Rate Generator creates a lower frequency baud rate clock for data
transmission. The input to the BRG is the system clock. The UART Baud Rate High and
Low Byte Registers combine to create a 16-bit baud rate divisor value (BRG[15:0]) that
sets the data transmission rate (baud rate) of the UART. The UART data rate is calculated
using the following equation:
UART Data Rate (bits/s)
Figure 16. UART Receiver Interrupt Service Routine Flow
Read Data
=
---------------------------------------------------------------------------------------------
16xUART Baud Rate Divisor Value
No
System Clock Frequency (Hz)
clears RDA bit and
Read Data which
resets error bits
Discard Data
Read Status
Receiver
Receiver
Interrupt
Ready
Errors?
Yes
Universal Asynchronous Receiver/Transmitter
Z8 Encore! XP
Product Specification
®
F0822 Series
99
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