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Tm4c HOST-BUS 8 Timing issue

Hello,

We are using HB8 ADD mode to transfer data between FPGA-Tiva

Configuration is 

SysCtlPeripheralEnable(SYSCTL_PERIPH_EPI0);

EPIDividerSet(EPI0_BASE, 2);

EPIModeSet(EPI0_BASE, EPI_MODE_HB8);
EPIConfigHB8Set(EPI0_BASE,(EPI_HB8_MODE_ADDEMUX | EPI_HB8_WRWAIT_2 |EPI_HB8_RDWAIT_2 | EPI_HB8_WORD_ACCESS |EPI_HB8_CSBAUD), 0);
EPIConfigHB8CSSet(EPI0_BASE,1,(EPI_HB8_MODE_ADDEMUX |EPI_HB8_WRWAIT_3|EPI_HB8_RDWAIT_3 ));

EPIAddressMapSet(EPI0_BASE, EPI_ADDR_PER_BASE_C | EPI_ADDR_PER_SIZE_256B);

While probing RD_wait and Write_wait lines are showing delay of 200 ns,But chip select  is showing  33 nanosecond.

Why this is occurring,according to datasheet chip select and read wait must be of same timing,

Is there any thing missing in configuration or any relevant  changes please replay.

Regards,

Krishnan