z8f083a ZiLOG Semiconductor, z8f083a Datasheet - Page 151
z8f083a
Manufacturer Part Number
z8f083a
Description
High-performance 8-bit Microcontrollers
Manufacturer
ZiLOG Semiconductor
Datasheet
1.Z8F083A.pdf
(256 pages)
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PS026308-1207
Debug Command
Execute Instruction
Reserved
In the following bulleted list of OCD commands, data and commands sent from the host to
the On-Chip Debugger are identified by ‘
Chip 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.
DBG
DBG
DBG
Read OCD Status Register (02H)—The read OCD status register command reads the
OCDSTAT register.
DBG
DBG
Read Runtime Counter (03H)—The runtime counter counts system clock cycles in
between breakpoints. The 16-bit runtime counter counts from
maximum count of
read memory, write register, read register, read memory CRC, step instruction, stuff
instruction, and execute instruction commands.
DBG
DBG
DBG
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 (
return the device to normal operating mode, the device must be reset.
DBG
DBG
Read OCD Control Register (05H)—The read OCD control register command reads
the value of the OCDCTL register.
DBG
DBG
←
→
→
←
→
←
→
→
←
←
←
→
00H
OCDRev[15:8] (Major revision number)
OCDRev[7:0] (Minor revision number)
02H
OCDSTAT[7:0]
03H
RuntimeCounter[15:8]
RuntimeCounter[7:0]
04H
OCDCTL[7:0]
05H
OCDCTL[7:0]
Command
13H–FFH
Byte
12H
FFFFH
NOT in DEBUG
. The runtime counter is overwritten during the write memory,
Enabled when
OCDCTL
mode?
–
–
DBG ← Command/Data
[7]) is set to 1 only, it cannot be cleared to 0. To
DBG → Data
Flash Read Protect Option Bit
Z8 Encore!
’
Disabled by
Product Specification
Disabled
’. Data sent from the On-
0000H
–
®
On-Chip Debugger
F083A Series
and stops at the
139
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