z16f2811 ZiLOG Semiconductor, z16f2811 Datasheet - Page 314

• Manufacturer Part Number: z16f2811
• Description: High Performance Microcontrollers
• Manufacturer: ZiLOG Semiconductor

PS022006-0207
9-Bit Mode
Start Bit Flow Control
The serial interface is configured to transmit and receive a ninth data bit. This ninth bit is
used to transmit or receive a software generated parity bit. It is used as an address/data bit
in a multi-node system such as RS-485.
If flow control is needed, start bit flow control is used. Start bit flow control requires the
receiving device send the start bit. The transmitter waits for the start bit, then transmit its
data following the start bit.
Figure 65. Output Driver when Drive High and Open Drain enabled
ST = Start Bit
SP = Stop Bit
NB = Ninth Bit
D0-D7 = Data Bits
ST
Output
Driver
{
D0
System Clock
Bus Voltage
Drive High
High Impedance
Drive Low
D1
D2
Figure 66. 9-Bit Mode
P R E L I M I N A R Y
D3
Logic 0
D4
D5
D6
Logic 1
D7
NB
Product Specification
ZNEO
SP
On-Chip Debugger
™
Z16F Series
300