Str 71X; Str 73X; Str 75X; Str91X - Segger J-Link User Manual

If you experience problems with a particular device, do not hesitate to contact Seg-
ger.
7.7.1

STR 71x

These devices are ARM7TDMI based.
All devices of this family are supported by J-Link.
7.7.2

STR 73x

These devices are ARM7TDMI based.
All devices of this family are supported by J-Link.
7.7.3

STR 75x

These devices are ARM7TDMI-S based.
All devices of this family are supported by J-Link.
7.7.4

STR91x

These device are ARM966E-S based.
All devices of this family are supported by J-Link.
7.7.4.1 Flash erasing
The devices have 3 TAP controllers built-in. When starting J-Link.exe, it reports 3
JTAG devices. A special tool, J-Link STR9 Commander (JLinkSTR91x.exe) is available
to directly access the flash controller of the device. This tool can be used to erase the
flash of the controller even if a program is in flash which causes the ARM core to
stall. For more information about the J-Link STR9 Commander, please refer to J-Link
STR91x Commander (Command line tool) on page 59.
When starting the STR91x commander, a command sequence will be performed
which brings MCU into Turbo Mode.
"While enabling the Turbo Mode, a dedicated test mode signal is set and controls the
GPIOs in output. The IOs are maintained in this state until a next JTAG instruction is
send." (ST Microelectronics)
Enabling Turbo Mode is necessary to guarantee proper function of all commands in
the STR91x Commander.
7.7.5

STM32

These device are Cortex-M3 based.
All devices of this family are supported by J-Link.
7.7.5.1 Option byte programming
we suggest to perform the programming of the option bytes directly from the target
application. J-Link (or an additional software tool like J-Flash) does not support pro-
gramming of the option bytes.
7.7.5.2 Read-protection
The user area internal flash of the STM32 devices can be protected against read by
untrusted code. In order to unsecure a read-protected STM32 device, SEGGER offers
a free command line tool which overrides the read-protection of a STM32 device. For
more information about the J-Link STM32 Commander, please refer to J-Link STM32
Commander (Command line tool) on page 60.
Note: J-Flash ARM supports securing and unsecuring a STM32 device, too.
J-Link / J-Trace (UM08001) © 2004-2009 SEGGER Microcontroller GmbH & Co. KG
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