Z8F082ASH020SC Datasheet, PDF (173/244 Pages) Zilog, Inc. – Z8 Encore XP-R F08xA Series with eXtended Peripherals

Z8 Encore! XP^® F08xA Series
Product Specification
155
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]
• Read Program Counter (07H)—The Read Program Counter command reads the value
in 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, this command returns FFFFH.
DBG ← 07H
DBG → ProgramCounter[15:8]
DBG → ProgramCounter[7:0]
• Write Register (08H)—The Write Register command writes data to the Register File.
Data can be written 1–256 bytes at a time (256 bytes can be written by setting size to 0). If
the device is not in DEBUG mode, the address and data values are discarded. If the Flash
Read Protect Option bit is enabled, only writes to the Flash Control Registers are allowed
and all other register write data values are discarded.
DBG ← 08H
DBG ← {4’h0,Register Address[11:8]}
DBG ← Register Address[7:0]
DBG ← Size[7:0]
DBG ← 1-256 data bytes
• Read Register (09H)—The Read Register command reads data from the Register File.
Data can be read 1–256 bytes at a time (256 bytes can be read by setting size to 0). If the
device is not in DEBUG mode or if the Flash Read Protect Option bit is enabled, this com-
mand returns FFH for all the data values.
DBG ← 09H
DBG ← {4’h0,Register Address[11:8]
DBG ← Register Address[7:0]
PS024705-0405
PRELIMINARY
On-Chip Debugger