Z8FMC04100 ZILOG [Zilog, Inc.], Z8FMC04100 Datasheet - Page 149

• Manufacturer Part Number: Z8FMC04100
• Description: Z8 Encore-R Motor Control Flash MCUs
• Manufacturer: ZILOG [Zilog, Inc.]

PS024604-1005
Noise Filter
LIN-UART Baud Rate Generator
The transmitter can be enabled in this mode.
The LIN-UART Baud Rate Generator creates a lower frequency baud rate clock for data
transmission. The input to the Baud Rate Generator is the system clock. The LIN-UART
Baud Rate High and Low Byte registers combine to create a 16-bit baud rate divisor value
(
UART data rate is calculated using the following equation for normal UART operation:
The LIN-UART data rate is calculated using the following equation for LIN mode UART
operation:
When the LIN-UART is disabled, the Baud Rate Generator can function 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
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
A noise filter circuit is included which filters noise on a digital input signal (such as UART
Receive Data) before the data is sampled by the block. This is likely to be a requirement
for protocols with a noisy environment.
The noise filter contains the following features:
•
•
UART Data Rate (bits/s) =
UART Data Rate (bits/s) =
BRG
Register to 0 (
Byte registers.
BRGCTL bit in the LIN-UART Control 1 Register to 1.
Synchronizes the receive input data to the System Clock
Noise Filter Enable (
0) or included (
[15:0]) that sets the data transmission rate (baud rate) of the LIN-UART. The LIN-
TEN
NFEN = 1
bit may be asserted, transmit activity may occur).
NFEN
P R E L I M I N A R Y
UART Baud Rate Divisor Value
) input selects whether the noise filter is bypassed (
16 x UART Baud Rate Divisor Value
) in the receive data path.
System Clock Frequency (Hz)
System Clock Frequency (Hz)
REN
bit in the LIN-UART Control 0
LIN-UART Baud Rate Generator
Product Specification
NFEN
=
127