Z8 Encore! XP® 4K Series
Product Specification
176
Data can be read 1–65536 bytes at a time (65536 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
command returns FFHfor the data.
DBG ← 0BH
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
•
Write Data Memory (0CH)—The Write Data Memory command writes data to Data
Memory. This command is equivalent to the LDE and LDEI instructions. Data can be writ-
ten 1–65536 bytes at a time (65536 bytes can be written by setting size to 0). If the device
is not in DEBUG mode or if the Flash Read Protect Option bit is enabled, the data is dis-
carded.
DBG ← 0CH
DBG ← Data Memory Address[15:8]
DBG ← Data Memory Address[7:0]
DBG ← Size[15:8]
DBG ← Size[7:0]
DBG ← 1-65536 data bytes
•
•
Read Data Memory (0DH)—The Read Data Memory command reads from Data Mem-
ory. This command is equivalent to the LDE and LDEI instructions. Data can be read 1 to
65536 bytes at a time (65536 bytes can be read by setting size to 0). If the device is not in
DEBUG mode, this command returns FFHfor the data.
DBG ← 0DH
DBG ← Data Memory Address[15:8]
DBG ← Data Memory Address[7:0]
DBG ← Size[15:8]
DBG ← Size[7:0]
DBG → 1-65536 data bytes
Read Program Memory CRC (0EH)—The Read Program Memory CRC command
computes and returns the Cyclic Redundancy Check (CRC) of Program Memory using the
16-bit CRC-CCITT polynomial. If the device is not in DEBUG mode, this command re-
turns FFFFHfor the CRC value. Unlike most other OCD Read commands, there is a delay
from issuing of the command until the OCD returns the data. The OCD reads the Program
Memory, calculates the CRC value, and returns the result. The delay is a function of the
Program Memory size and is approximately equal to the system clock period multiplied
by the number of bytes in the Program Memory.
DBG ← 0EH
DBG → CRC[15:8]
DBG → CRC[7:0]
PS022815-0206
On-Chip Debugger
ZILOG [ ZILOG, INC. ]
