Z8F6421PM020SC Datasheet, PDF (220/299 Pages) Zilog, Inc. – High Performance 8-Bit Microcontrollers Z8 Encore-R 64K Series

Z8 Encore!^® 64K Series
Product Specification
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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 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 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
zero). If the device is not in DEBUG mode, the address and data values are discarded.
If the Read Protect Option Bit is enabled, then 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
zero). If the device is not in DEBUG mode or if the Read Protect Option Bit is
enabled, this command returns FFH for all the data values.
DBG ← 09H
DBG ← {4’h0,Register Address[11:8]
DBG ← Register Address[7:0]
DBG ← Size[7:0]
DBG → 1-256 data bytes
• Write Program Memory (0AH)—The Write Program Memory command writes data
to Program Memory. This command is equivalent to the LDC and LDCI instructions.
Data can be written 1-65536 bytes at a time (65536 bytes can be written by setting size
to zero). The on-chip Flash Controller must be written to and unlocked for the
PS019915-1005
On-Chip Debugger