Z8 Encore!® Motor Control Flash MCUs
Product Specification
114
5. Check the TDREbit in the LIN-UART Status 0 register to determine if the Transmit
Data Register is empty (indicated by a 1). If empty, continue to Step 6. If the Transmit
Data Register is full (indicated by a 0), continue to monitor the TDREbit until the
Transmit Data Register becomes available to receive new data.
6. If in MULTIPROCESSOR mode, write the LIN-UART Control 1 Register to select
the outgoing address bit.
Set the Multiprocessor Bit Transmitter (MPBT) if sending an address byte; clear it if
sending a data byte.
7. Write the data byte to the LIN-UART Transmit Data Register. The transmitter auto-
matically transfers the data to the Transmit Shift register and transmits the data.
8. If appropriate, and if MULTIPROCESSOR mode is enabled, make any changes to the
Multiprocessor Bit Transmitter (MPBT) value.
9. To transmit additional bytes, return to Step 5.
Transmitting Data using the Interrupt-Driven Method
The LIN-UART Transmitter interrupt indicates the availability of the Transmit Data Reg-
ister to accept new data for transmission. Follow these steps to configure the LIN-UART
for interrupt-driven data transmission:
1. Write to the LIN-UART Baud Rate High and Low Byte registers to set the appropriate
baud rate.
2. Enable the LIN-UART pin functions by configuring the associated GPIO port pins for
alternate function operation.
3. Execute a DI instruction to disable interrupts.
4. Write to the Interrupt control registers to enable the LIN-UART Transmitter interrupt
and set the appropriate priority.
5. If multiprocessor mode is appropriate, write to the LIN-UART Control 1 Register to
enable Multiprocessor (9-bit) mode functions.
Set the MULTIPROCESSOR Mode Select (MPEN) to Enable MULTIPROCESSOR
mode.
6. Write to the LIN-UART Control 0 Register to:
a. Set the transmit enable bit (TEN) to enable the LIN-UART for data transmission
b. If multiprocessor mode is not enabled, enable parity, if appropriate, and select
either even or odd parity.
c. Set or clear the CTSEbit to enable or disable control from the remote receiver via
the CTS pin.
LIN-UART
P R E L I M I N A R Y
PS024604-1005
ZILOG [ ZILOG, INC. ]
