z16f2811 ZiLOG Semiconductor, z16f2811 Datasheet - Page 178

• Manufacturer Part Number: z16f2811
• Description: High Performance Microcontrollers
• Manufacturer: ZiLOG Semiconductor

PS022006-0207
UART Baud Rate Error (%)
The baud rate error relative to the appropriate baud rate is calculated using the following
equation:
For reliable communication, the LIN-UART baud rate error must never exceed 5 percent.
Table 92
commonly used crystal oscillator frequencies for normal UART mode of operation
When the LIN-UART is disabled, the baud rate generator functions as a basic 16-bit timer
with interrupt on time-out. To configure the baud rate generator as a timer with interrupt on
time-out, complete the following procedure:
1. Disable the LIN-UART receiver by clearing the REN bit in the LIN-UART control 0
2. Load the appropriate 16-bit count value into the LIN-UART baud rate high and low
3. Enable the baud rate generator timer function and associated interrupt by setting the
When configured as a general purpose timer, the BRG interrupt interval is calculated using
the following equation:
UART BRG Interrupt Interval (s)
register to 0 (
byte registers.
BRGCTL bit in the LIN-UART control 1 register to 1. Enable the UART receive
interrupt in the interrupt controller.
on page 165 provides information on baud rate errors for popular baud rates and
TEN
bit is asserted, transmit activity may occur).
P R E L I M I N A R Y
=
100
×
⎛
⎝
Actual Data Rate Desired Data Rate
------------------------------------------------------------------------------------------------ -
=
System Clock Period (s) BRG[15:0]
Desired Data Rate
–
Product Specification
ZNEO
×
™
Z16F Series
LIN-UART
⎞
⎠
164