Z8 Encore! XP® 4K Series
Product Specification
175
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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
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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 FFHfor 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 0).
The on-chip Flash Controller must be written to and unlocked for the programming oper-
ation to occur. If the Flash Controller is not unlocked, the data is discarded. If the device
is not in DEBUG mode or if the Flash Read Protect Option bit is enabled, the data is dis-
carded.
DBG ← 0AH
DBG ← Program Memory Address[15:8]
DBG ← Program Memory Address[7:0]
DBG ← Size[15:8]
DBG ← Size[7:0]
DBG ← 1-65536 data bytes
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Read Program Memory (0BH)—The Read Program Memory command reads data
from Program Memory. This command is equivalent to the LDC and LDCI instructions.
PS022815-0206
On-Chip Debugger
ZILOG [ ZILOG, INC. ]
