Z8 Encore! XP
®
4K Series
Product Specification
99
Receiver
Ready
Receiver
Interrupt
Read Status
No
Errors?
Yes
Read Data which
clears RDA bit and
resets error bits
Read Data
Discard Data
Figure 15.UART Receiver Interrupt Service Routine Flow
Baud Rate Generator Interrupts
If the baud rate generator (BRG) interrupt enable is set, the UART Receiver interrupt
asserts when the UART Baud Rate Generator reloads. This condition allows the Baud
Rate Generator to function as an additional counter if the UART functionality is not
employed.
UART Baud Rate Generator
The UART Baud Rate Generator creates a lower frequency baud rate clock for data trans-
mission. The input to the Baud Rate Generator is the system clock. The UART Baud Rate
High and Low Byte registers combine to create a 16-bit baud rate divisor value
PS022815-0206
UART
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