z16f2811 ZiLOG Semiconductor, z16f2811 Datasheet - Page 315

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

PS022006-0207
Initialization
Initialization during Reset
If the standard serial port of a PC is used, transmit flow control is enabled on the ZNEO
Z16F Series device. The PC sends the start bit when receiving data by transmitting the
character FFH. Since character FFH is also received from a non-responsive device, space
parity (parity bit always zero) must be enabled and used as an acknowledge bit.
The OCD ignores any data received until it receives the read revision command
After the read revision command is received, the remaining debug commands are issued.
The packet CRC is not sent for the first read revision command issued during
initialization.
The OCD is initialized during reset. This is done by asserting the reset pin, sending the
auto-baud character, and then issuing the read revision command. When the OCD is
initialized during reset, the
Receiving
Device
Transmitting
Device
Single Wire
Bus
ST = Start Bit
SP = Stop Bit
D0-D7 = Data Bits
Figure 67. Start Bit Flow Control
ST
ST
D0
D0
P R E L I M I N A R Y
DBGHALT
D1
D1
D2
D2
bit in the OCDCTL register is automatically set.
D3
D3
D4
D4
D5
D5
D6
D6
D7
D7
Product Specification
ZNEO
SP
SP
On-Chip Debugger
™
Z16F Series
00H
.
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