Some error about SPI clock and JLINK firmwair

[xiaoqing]

1: my nrf51 SDK board not work , I replace the USB control IC--ATSAM3U1C-AU(the old is ATSAM3U2CA-AU),can you send me the firmwair of JLINK with this IC and the contacted software 2: I use the demo code (nRF51_SDK_9.0.0_2e23562-NORDIC\nRF51_SDK_9.0.0_2e23562\examples\peripheral\spi_master) find a BUG(?) : when i use 1M clock , 1byte translate use about 10us, the delay between 2 byte is OK, when i use 4M clock , 1byte translate still use about 10us, the delay tbetween 2 byte is about 8us,

Now i need a quick SPI (>4M) work normal,thanks

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[Susheel Nuguru]

your description is very unclear. Where did you find a bug and how did you verify this?