8.10.00 J-TRACE ARM Segger Microcontroller Systems, 8.10.00 J-TRACE ARM Datasheet - Page 127
![JTAG EMULATOR ARM7/ARM9 ETM](/photos/9/27/92738/8_10_00-j-trace-arm_sml.jpg)
8.10.00 J-TRACE ARM
Manufacturer Part Number
8.10.00 J-TRACE ARM
Description
JTAG EMULATOR ARM7/ARM9 ETM
Manufacturer
Segger Microcontroller Systems
Type
Emulatorr
Specifications of 8.10.00 J-TRACE ARM
Contents
Emulation Module
For Use With/related Products
ARM7, ARM9
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
899-1006
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J-Link / J-Trace (UM08001)
Note:
tialized.
Table 5.10: Global DLL variables
CPU
JTAG_IRPre
JTAG_DRPre
JTAG_IRPost
JTAG_DRPost
JTAG_IRLen
JTAG_TotalIRLen
JTAG_AllowTAPReset
JTAG_Speed
Variable
All global variables are treated as unsigned 32-bit values and are zero-ini-
Used to set the target CPU core. If auto-detec-
tion of the device is not possible, you have to
set this variable to tell J-Link what CPU core is
connected to it. This variable can only be set
to a known Global J-Link DLL constant. For a
list of all valid values, please refer to Global
DLL constants on page 128.
Example
CPU = ARM926EJS;
Used for JTAG chain configuration. Sets the
number of IR-bits of all devices which are
closer to TDO than the one we want to com-
municate with.
Example
JTAG_IRPre = 6;
Used for JTAG chain configuration. Sets the
number of devices which are closer to TDO
than the one we want to communicate with.
Example
JTAG_DRPre = 2;
Used for JTAG chain configuration. Sets the
number of IR-bits of all devices which are
closer to TDI than the one we want to commu-
nicate with.
Example
JTAG_IRPost = 6;
Used for JTAG chain configuration. Sets the
number of devices which are closer to TDI
than the one we want to "communicate with.
Example
JTAG_DRPost = 0;
IR-Len (in bits) of the device we want to com-
municate with.
Example
JTAG_IRLen = 4;
Computed automatically, based on the values
of JTAG_IRPre, JTAG_DRPre,
JTAG_DRPost.
Example
v = JTAG_TotalIRLen;
En-/Disables auto-JTAG-detection of J-Link.
Has to be disabled for devices which need
some special init (for example to add the core
to the JTAG chain), which is lost at a TAP
reset.
Allowed values
Sets the JTAG interface speed. Speed is given
in kHz.
Example
JTAG_Speed = 2000; // 2MHz JTAG speed
0 Auto-detection is enabled.
1 Auto-detection is disabled.
Description
© 2004-2011 SEGGER Microcontroller GmbH & Co. KG
JTAG_IRPost
and
Write-only
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read-only
Write-only
Write-only
R/W
127
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