Z8F4822AR020SG Datasheet, PDF (109/323 Pages) Zilog, Inc. – High Performance 8-Bit Microcontrollers

Z8 Encore! XP^® F64xx Series
Product Specification
89
Idle State
of Line
lsb
1
Data Field
msb
Start Bit0 Bit1 Bit2 Bit3 Bit4 Bit5 Bit6 Bit7
0
Stop Bit(s)
1
2
Figure 14. UART Asynchronous Data Format without Parity
Idle State
of Line
lsb
1
Data Field
msb
Start Bit0 Bit1 Bit2 Bit3 Bit4 Bit5 Bit6 Bit7 Parity
0
Stop Bit(s)
1
2
Figure 15. UART Asynchronous Data Format with Parity
Transmitting Data using the Polled Method
Observe the following procedure to transmit data using the polled method of operation:
1. Write to the UART Baud Rate High and Low Byte registers to set the appropriate baud
rate.
2. Enable the UART pin functions by configuring the associated GPIO port pins for
alternate function operation.
3. If MULTIPROCESSOR Mode is appropriate, write to the UART Control 1 Register to
enable MULTIPROCESSOR (9-Bit) Mode functions.
– Set the MULTIPROCESSOR Mode Select (MPEN) to Enable MULTIPROCES-
SOR Mode
4. Write to the UART Control 0 Register to:
– Set the transmit enable bit (TEN) to enable the UART for data transmission
– If parity is appropriate and MULTIPROCESSOR Mode is not enabled, set the par-
ity enable bit (PEN) and select either Even or Odd parity (PSEL)
PS019924-0113
PRELIMINARY
Operation