Z8F042ASJ020EG2156 Datasheet, PDF (116/280 Pages) Zilog, Inc. – High-Performance 8-Bit Microcontrollers

Z8 Encore! XP^® F082A Series
Product Specification
101
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 11. 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 12. UART Asynchronous Data Format with Parity
Transmitting Data using the Polled Method
Observe the following 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 required baud
rate.
2. Enable the UART pin functions by configuring the associated GPIO port pins for
alternate function operation.
3. Write to the UART Control 1 Register, if MULTIPROCESSOR Mode is appropriate,
to enable MULTIPROCESSOR (9-bit) Mode functions.
4. Set the Multiprocessor Mode Select (MPEN) bit to enable MULTIPROCESSOR
Mode.
5. Write to the UART Control 0 Register to:
– Set the transmit enable bit (TEN) to enable the UART for data transmission
– Set the parity enable bit (PEN), if parity is appropriate and MULTIPROCESSOR
Mode is not enabled and select either even or odd parity (PSEL)
PS022828-0413
PRELIMINARY
Operation