pc87591l National Semiconductor Corporation, pc87591l Datasheet - Page 275
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pc87591l
Manufacturer Part Number
pc87591l
Description
Lpc Mobile Embedded Controllers
Manufacturer
National Semiconductor Corporation
Datasheet
1.PC87591L.pdf
(437 pages)
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Revision 1.07
Embedded Controller Modules
4.20.8 CR16B Development Support Registers
For a summary of the abbreviations used for Register Type, see “Register Abbreviations and Access” on page 34.
CR16B Development Support Register Map
Debug Configuration Register (DBGCFG)
The DBGCFG register controls the configuration of debug support features. On reset, DBGCFG is cleared (0).
Only the software development tools may access DBGCFG. This enables application software to be binary compatible in all
environments.
Location: 00 FF16
Type: R/W
Bit
Name
Reset
7-3
Bit
0
1
2
ON.
0: In IRE environment, this bit is always cleared to 0; any data written to it is ignored. The ON bit becomes read-
1: In OBD and DEV environments, enables the following debug support features:
FREEZE.
0: No effect
1: When ON is 1, the WATCHDOG timer is stopped from counting. All bits that use destructive reads (i.e., bits set
BRKLE (Break Line Enable).
0: Break Line input is ignored by core
1: In DEV environment, when BRKLE is set, the BRKL input signal is passed to the core
Reserved.
only when DBGL bit in DCR register in the core is set.
- ISE interrupt signal
- Use of other bits in DBGCFG register
or cleared by read operations and other events triggered by reads) become indifferent to reads. An exception
is NMISTAT register, which is always affected by reads. The DBGFRZEN register controls the impact of
FREEZE bit on a group of modules, enabling the group to be indifferent to the FREEZE being set. FREEZE has
no effect when ON is 0.
16
DBGCFG
DBGFRZEN Debug Freeze Enable
7
0
Mnemonic
Debug Configuration
6
0
Reserved
(Continued)
5
0
Register Name
Description
275
4
0
3
0
BRKLE
0
2
Type
R/W
R/W
FREEZE
1
0
www.national.com
ON
0
0
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