diff options
Diffstat (limited to 'src/jtag/drivers/usb_blaster/README.CheapClone')
| -rw-r--r-- | src/jtag/drivers/usb_blaster/README.CheapClone | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/src/jtag/drivers/usb_blaster/README.CheapClone b/src/jtag/drivers/usb_blaster/README.CheapClone index 983a441..bd048d5 100644 --- a/src/jtag/drivers/usb_blaster/README.CheapClone +++ b/src/jtag/drivers/usb_blaster/README.CheapClone @@ -47,11 +47,11 @@ Pinout Throughput considerations ========================= -Mesurements on a scope reveal that : - - for bitbang mode, the throughtput is 56.5 kbits/s - (as each clock transition is mesured at 17.7us) +Measurements on a scope reveal that : + - for bitbang mode, the throughput is 56.5 kbits/s + (as each clock transition is measured at 17.7us) - for byteshift mode, the throughput is 107.7 kbits/s - (as 63 bits TDI transmission is mesured in 585 us) + (as 63 bits TDI transmission is measured in 585 us) Let's suppose that to upload a 32 bits value, it is necessary to : - move from IDLE to DR-SHIFT : 3 bitbang (3 TMS transitions) @@ -62,8 +62,8 @@ So for this 32 bits of data, the time would be : = 53.1us + 222us + 88.5us = 363us -Throughtput in bit/s: 32 * (1 / 363E-6) = 88000 bits/s -Throughtput in bytes/s: 11kBytes/s +Throughput in bit/s: 32 * (1 / 363E-6) = 88000 bits/s +Throughput in bytes/s: 11kBytes/s Conclusion ========== |