z8f1621 ZiLOG Semiconductor, z8f1621 Datasheet - Page 116
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z8f1621
Manufacturer Part Number
z8f1621
Description
High Performance 8-bit Microcontrollers
Manufacturer
ZiLOG Semiconductor
Datasheet
1.Z8F1621.pdf
(297 pages)
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PS019921-0308
Transmitting Data using the Interrupt-Driven Method
5. Check the TDRE bit in the UART Status 0 register to determine if the Transmit Data
6. Write the UART Control 1 register to select the outgoing address bit.
7. Set the MULTIPROCESSOR Bit Transmitter (MPBT) if sending an address byte, clear
8. Write the data byte to the UART Transmit Data register. The transmitter automatically
9. If desired and MULTIPROCESSOR mode is enabled, make any changes to the
10. To transmit additional bytes, return to
The UART transmitter interrupt indicates the availability of the Transmit Data register to
accept new data for transmission. Follow the steps below to configure the UART for inter-
rupt-driven data transmission:
1. Write to the UART Baud Rate High and Low Byte registers to set the desired baud
2. Enable the UART pin functions by configuring the associated GPIO Port pins for
3. Execute a DI instruction to disable interrupts.
4. Write to the Interrupt control registers to enable the UART Transmitter interrupt and
5. If MULTIPROCESSOR mode is desired, write to the UART Control 1 register to
6. Set the MULTIPROCESSOR Mode Select (MPEN) to Enable MULTIPROCESSOR
7. Write to the UART Control 0 register to:
–
register is empty (indicated by a 1). If empty, continue to
register is full (indicated by a 0), continue to monitor the TDRE bit until the Transmit
Data register becomes available to receive new data.
it if sending a data byte.
transfers the data to the Transmit Shift register and transmits the data.
MULTIPROCESSOR Bit Transmitter (MPBT) value.
rate.
alternate function operation.
set the desired priority.
enable MULTIPROCESSOR (9-bit) mode functions.
mode.
–
–
–
Set or clear the CTSE bit to enable or disable control from the remote receiver
using the CTS pin.
Set the transmit enable bit (TEN) to enable the UART for data transmission.
Enable parity, if desired and if MULTIPROCESSOR mode is not enabled, and
select either even or odd parity.
Set or clear the CTSE bit to enable or disable control from the remote receiver via
the CTS pin.
step
5.
Z8 Encore! XP
step
Product Specification
6. If the Transmit Data
®
F64XX Series
UART
102
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