Z8F082ASH020SC Datasheet, PDF (172/244 Pages) Zilog, Inc. – Z8 Encore XP-R F08xA Series with eXtended Peripherals

Z8 Encore! XP^® F08xA Series
Product Specification
154
Debug Command
Command Enabled when NOT
Byte
in DEBUG mode?
Write Data Memory
0CH
–
Read Data Memory
0DH
–
Read Program Memory CRC 0EH
–
Reserved
0FH
–
Step Instruction
10H
–
Stuff Instruction
11H
–
Execute Instruction
12H
–
Reserved
13H–FFH
–
Disabled by
Flash Read Protect Option Bit
Yes
–
–
–
Disabled
Disabled
Disabled
–
In the following bulleted list of OCD Commands, data and commands sent from the host
to the On-Chip Debugger are identified by ’DBG ← Command/Data’. Data sent from the
On-Chip Debugger back to the host is identified by ’DBG → Data’
• Read OCD Revision (00H)—The Read OCD Revision command determines the ver-
sion of the On-Chip Debugger. If OCD commands are added, removed, or changed, this
revision number changes.
DBG ← 00H
DBG → OCDRev[15:8] (Major revision number)
DBG → OCDRev[7:0] (Minor revision number)
• Read OCD Status Register (02H)—The Read OCD Status Register command reads the
OCDSTAT register.
DBG ← 02H
DBG → OCDSTAT[7:0]
• Read Runtime Counter (03H)—The Runtime Counter counts system clock cycles in
between Breakpoints. The 16-bit Runtime Counter counts up from 0000H and stops at the
maximum count of FFFFH. The Runtime Counter is overwritten during the Write Memo-
ry, Read Memory, Write Register, Read Register, Read Memory CRC, Step Instruction,
Stuff Instruction, and Execute Instruction commands.
DBG ← 03H
DBG → RuntimeCounter[15:8]
DBG → RuntimeCounter[7:0]
• Write OCD Control Register (04H)—The Write OCD Control Register command
writes the data that follows to the OCDCTL register. When the Flash Read Protect Option
Bit is enabled, the DBGMODE bit (OCDCTL[7]) can only be set to 1, it cannot be cleared
PS024705-0405
PRELIMINARY
On-Chip Debugger