z8f1621 ZiLOG Semiconductor, z8f1621 Datasheet - Page 123

• Manufacturer Part Number: z8f1621
• Description: High Performance 8-bit Microcontrollers
• Manufacturer: ZiLOG Semiconductor

PS019921-0308
UART Baud Rate Generator
Baud Rate Generator Interrupts
If the Baud Rate Generator interrupt enable is set, the UART Receiver interrupt asserts
when the UART Baud Rate Generator reloads. This action allows the Baud Rate Genera-
tor to function as an additional counter if the UART functionality is not employed.
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
Figure 17. UART Receiver Interrupt Service Routine Flow
Read Data
No
clears RDA bit and
Read Data which
resets error bits
Discard Data
Read Status
Receiver
Receiver
Interrupt
Ready
Errors?
Yes
Z8 Encore! XP
Product Specification
®
F64XX Series
UART
109