z8f1621 ZiLOG Semiconductor, z8f1621 Datasheet - Page 214
z8f1621
Manufacturer Part Number
z8f1621
Description
High Performance 8-bit Microcontrollers
Manufacturer
ZiLOG Semiconductor
Datasheet
1.Z8F1621.pdf
(297 pages)
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On-Chip Debugger Commands
Table 101. On-Chip Debugger Commands
PS019921-0308
Debug Command
Read OCD Revision
Read OCD Status
Register
Read Runtime Counter
Write OCD Control
Register
Read OCD Control
Register
Write Program Counter
Read Program Counter
Write Register
Read Register
Write Program Memory
Read Program Memory
Write Data Memory
Read Data Memory
The host communicates to the On-Chip Debugger by sending OCD commands using the
DBG interface. During normal operation, only a subset of the OCD commands are avail-
able. In DEBUG mode, all OCD commands become available unless the user code and
control registers are protected by programming the Read Protect Option Bit (RP). The
Read Protect Option Bit prevents the code in memory from being read out of the Z8
Encore! XP
commands are disabled.
mands. Each OCD command is described in detail in the bulleted list following
Table 101
(normal operation) and those commands that are disabled by programming the Read Pro-
tect Option Bit.
indicates those commands that operate when the device is not in DEBUG mode
Command
Byte
®
F64XX Series products. When this option is enabled, several of the OCD
0AH
0BH
0CH
0DH
02H
04H
05H
06H
07H
09H
00H
03H
08H
Table 101
Enabled when
NOT in DEBUG
mode?
contains a summary of the On-Chip Debugger com-
Yes
Yes
Yes
Yes
-
-
-
-
-
-
-
-
-
Disabled by
Read Protect Option Bit
Only writes of the Flash Memory Control
the Mass Erase command is allowed to
registers are allowed. Additionally, only
be written to the Flash Control register.
Z8 Encore! XP
Cannot clear DBGMODE bit
Product Specification
Disabled
Disabled
Disabled
Disabled
Disabled
Disabled
Disabled
-
-
-
-
®
On-Chip Debugger
F64XX Series
Table
101.
200
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