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Diffstat (limited to 'flashrom.8.tmpl')
| -rw-r--r-- | flashrom.8.tmpl | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/flashrom.8.tmpl b/flashrom.8.tmpl index c557af743..c1a228be7 100644 --- a/flashrom.8.tmpl +++ b/flashrom.8.tmpl @@ -331,6 +331,8 @@ bitbanging adapter) .sp .BR "* digilent_spi" " (for SPI flash ROMs attached to iCEblink40 development boards)" .sp +.BR "* jlink_spi" " (for SPI flash ROMs attached to SEGGER J-Link and compatible devices)" +.sp Some programmers have optional or mandatory parameters which are described in detail in the .B PROGRAMMER-SPECIFIC INFORMATION @@ -1131,6 +1133,60 @@ can be (in Hz). The default is a frequency of 4 MHz. .sp .SS +.BR "jlink_spi " programmer +.IP +This module supports SEGGER J-Link and compatible devices. + +The \fBMOSI\fP signal of the flash chip must be attached to \fBTDI\fP pin of +the programmer, \fBMISO\fP to \fBTDO\fP and \fBSCK\fP to \fBTCK\fP. +The chip select (\fBCS\fP) signal of the flash chip can be attached to +different pins of the programmer which can be selected with the +.sp +.B " flashrom \-p jlink_spi:cs=pin" +.sp +syntax where \fBpin\fP can be either \fBTRST\fP or \fBRESET\fP. +The default pin for chip select is \fBRESET\fP. +Note that, when using \fBRESET\fP, it is normal that the indicator LED blinks +orange or red. +.br +Additionally, the \fBVTref\fP pin of the programmer must be attached to the +logic level of the flash chip. +The programmer measures the voltage on this pin and generates the reference +voltage for its input comparators and adapts its output voltages to it. +.sp +Pinout for devices with 20-pin JTAG connector: +.sp + +-------+ + | 1 2 | 1: VTref 2: + | 3 4 | 3: TRST 4: GND + | 5 6 | 5: TDI 6: GND + +-+ 7 8 | 7: 8: GND + | 9 10 | 9: TCK 10: GND + | 11 12 | 11: 12: GND + +-+ 13 14 | 13: TDO 14: + | 15 16 | 15: RESET 16: + | 17 18 | 17: 18: + | 19 20 | 19: PWR_5V 20: + +-------+ +.sp +If there is more than one compatible device connected, you can select which one +should be used by specifying its serial number with the +.sp +.B " flashrom \-p jlink_spi:serial=number" +.sp +syntax where +.B number +is the serial number of the device (which can be found for example in the +output of lsusb -v). +.sp +The SPI speed can be selected by using the +.sp +.B " flashrom \-p jlink_spi:spispeed=frequency" +.sp +syntax where \fBfrequency\fP is the SPI clock frequency in kHz. +The maximum speed depends on the device in use. +.SS + .SH EXAMPLES To back up and update your BIOS, run .sp |