Z8 Encore!® 64K Series
Product Specification
100
Data Field
Stop Bit(s)
msb
Idle State
of Line
lsb
1
0
Start
Bit0
Bit1
Bit2
Bit3
Bit4
Bit5
Bit6
Bit7
1
2
Figure 14. UART Asynchronous Data Format without Parity
Data Field
Stop Bit(s)
Idle State
of Line
lsb
msb
Bit7
1
0
Start
Bit0
Bit1
Bit2
Bit3
Bit4
Bit5
Bit6
Parity
1
2
Figure 15. UART Asynchronous Data Format with Parity
Transmitting Data using the Polled Method
Follow these steps to transmit data using the polled method of operation:
1. Write to the UART Baud Rate High and Low Byte registers to set the desired baud
rate.
2. Enable the UART pin functions by configuring the associated GPIO Port pins for
alternate function operation.
3. If multiprocessor mode is desired, write to the UART Control 1 register to enable
Multiprocessor (9-bit) mode functions.
–
Set the MULTIPROCESSOR Mode Select (MPEN) to Enable
MULTIPROCESSOR 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 desired and MULTIPROCESSOR mode is not enabled, set the parity
enable bit (PEN) and select either Even or Odd parity (PSEL).
PS019915-1005
UART
ZILOG [ ZILOG, INC. ]
