z8f1621 ZiLOG Semiconductor, z8f1621 Datasheet - Page 215

• Manufacturer Part Number: z8f1621
• Description: High Performance 8-bit Microcontrollers
• Manufacturer: ZiLOG Semiconductor

Table 101. On-Chip Debugger Commands (Continued)
PS019921-0308
Debug Command
Read Program Memory
CRC
Reserved
Step Instruction
Stuff Instruction
Execute Instruction
Reserved
In the following list of OCD Commands, data and commands sent from the host to the On-
Chip Debugger are identified by ‘
Debugger back to the host is identified by ‘
•
•
•
•
•
Read OCD Revision (00H)—The Read OCD Revision command determines the
version of the On-Chip Debugger. If OCD commands are added, removed, or
changed, this revision number changes.
Read OCD Status Register (02H)—The Read OCD Status Register command reads
the OCDSTAT register.
Write OCD Control Register (04H)—The Write OCD Control Register command
writes the data that follows to the OCDCTL register. When the Read Protect Option
Bit is enabled, the DBGMODE bit (OCDCTL[7]) can only be set to 1, it cannot be
cleared to 0 and the only method of putting the device back into normal operating
mode is to reset the device.
Read OCD Control Register (05H)—The Read OCD Control Register command
reads the value of the OCDCTL register.
Write Program Counter (06H)—The Write Program Counter command writes the
data that follows to the eZ8 CPU’s Program Counter (PC). If the device is not in
DBG ← 00H
DBG → OCDREV[15:8] (Major revision number)
DBG → OCDREV[7:0] (Minor revision number)
DBG ← 02H
DBG → OCDSTAT[7:0]
DBG ← 04H
DBG ← OCDCTL[7:0]
DBG ← 05H
DBG → OCDCTL[7:0]
Command
Byte
13H - FFH
0EH
0FH
10H
12H
11H
Enabled when
NOT in DEBUG
mode?
DBG ← Command/Data
-
-
-
-
-
-
DBG → Data
Disabled by
Read Protect Option Bit
Z8 Encore! XP
’
’. Data sent from the On-Chip
Product Specification
Disabled
Disabled
Disabled
-
-
-
®
On-Chip Debugger
F64XX Series
201