Alesis QS Series Service Manual page 57

14-FLASH Command ACK Response F0 00 00 0E 0E 14 F7
This command is ignored if received by the QS6.
completing an erase command, or receiving a complete sector block write command.
15-FLASH Command NACK Response F0 00 00 0E 0E 15 <error> F7
<error>= 0..4 as follows:
0 = No card present / Not a FLASH card
1 = Card write protected
2 = Erase failed (FLASH chip timeout error)
3 = Checksum didn't match
4 = Programming failed (usually because block was not erased first)
This command is ignored if received by the QS6. It is sent out by the QS6 after receiving
an erase command that could not be completed, or receiving a complete sector block
write command that could not be programmed or whose checksum was invalid. In the
case of invalid checksum, the sending device is expected to resend the data at least
once before aborting.
NOTES ON FLASH CARDS:
• Best case programming time for each megabyte in a FLASH card will be 7 minutes, 45
seconds, assuming a typical FLASH programming time of 65 milliseconds per sector
block, and a typical erase time of 1.5 seconds per sector. This results in a transfer rate
of approximately 43 times slower than real time, assuming the samples are at 48KHz.
• The burden is placed on the sending device to avoid possible errors that can occur if a
sector above the total memory of a card is erased or written to (due to possible address
aliasing). It is not possible for the QS6 to determine the amount of memory in the card.
• The FLASH card must be a 5 volt only card (no 12 volt required for programming), must
have 64K byte sectors, must have 150 nanosecond or better chip enable read access
time, and must be compatible with the programming commands and Manufacturer's ID
codes of an Am29F040 4-Megabit FLASH memory from AMD.
Alesis QS Series Keyboards Service Manual V1.00
It is sent out by the QS6 after
48 11/19/06