Z8F0113HJ005EG Datasheet, PDF (178/245 Pages) Zilog, Inc. – High-Performance 8-Bit Microcontrollers

Z8 Encore! XP^® F0823 Series
Product Specification
163
In the following list of OCD Commands, data and commands sent from the host to the
OCD are identified by ’DBG ← Command/Data’. Data sent from the OCD back to the
host is identified by ’DBG → Data’.
Read OCD Revision (00H). The Read OCD Revision command determines the version of
the OCD. 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 Memory,
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 to 0
and the only method of returning the device to normal operating mode is to reset the
device.
DBG ← 04H
DBG ← OCDCTL[7:0]
Read OCD Control Register (05H). The Read OCD Control Register command reads the
value of the OCDCTL register.
DBG ← 05H
DBG → OCDCTL[7:0]
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 DEBUG
Mode or if the Flash Read Protect Option bit is enabled, the Program Counter (PC) values
are discarded.
DBG ← 06H
DBG ← ProgramCounter[15:8]
DBG ← ProgramCounter[7:0]
PS024315-1011
PRELIMINARY
On-Chip Debugger Commands