Default bitrate on nanofury should be 200kHz
diff --git a/driver-bitfury.c b/driver-bitfury.c
index 47d41dd..91eb7e9 100644
--- a/driver-bitfury.c
+++ b/driver-bitfury.c
@@ -366,7 +366,7 @@ static bool nf1_detect_one(struct cgpu_info *bitfury, struct bitfury_info *info)
if (!mcp2210_get_spi_transfer_settings(bitfury, &mcp->bitrate, &mcp->icsv,
&mcp->acsv, &mcp->cstdd, &mcp->ldbtcsd, &mcp->sdbd, &mcp->bpst, &mcp->spimode))
goto out;
- mcp->bitrate = 12000000;
+ mcp->bitrate = 200000; // default to 200kHz
mcp->icsv = 0xffff;
mcp->acsv = 0xffef;
mcp->cstdd = mcp->ldbtcsd = mcp->sdbd = mcp->spimode = 0;