
119
Maintenance
Firmware History
02/11/2009 TTP 7020™/TTP 7030™ Technical Manual P1003636-001
3.30 cont.
Interface
USB
1. Fixed the USB problem where the printers sometimes stop
communicating.
2. The firmware can now try to recover problems when the USB
communications stops (SOF tokens stops coming from the host). This
is done by taking the printer of the USB-bus and after 4 second put it
back on until the USB host recognize it, and resume communication.
This function can be switched on/off with system parameter (n57, bit 4,
“Disable USB recovery”).
3. The status LED is turned off when it tries to recover USB problems
(between USB disconnect and reconnect).
4. New parameter n59, Selects USB "Vendor Class” or "Printer Class",
and also change idProduct.
5. Changed value to 0x00 for:
USB ConfigurationDescriptor.bmAttributes,
USB DeviceDescriptor.bDeviceClass,
USB DeviceDescriptor.bDeviceSubClass, and
USB DeviceDescriptor.bDeviceProtocol
6. Firmware revision is now added to the USB Device Descriptor (the
bcdDevice field).
7. USB Device Descriptor has been updated to USB rev.1.1 (the bcdUSB
field)
8. Fixed issue # 90 USB Device Not Recognized
9. The USB chip will now also be hardware reset when it tries to recover
USB problems.
10.USB Tx-FIFO is cleared when new request is received to ensure that
old answer is NOT sent.
11. Will now clear RX-FIFO on channel 0 RX-error (USB), and will clear
stall conditions before clearing setup-flag on channel 0 as well.
Parallel
1. Fixed problem with parallel port error signaling in compatible mode
(Intel).
2. Register that controls Select, nFault and PError (on Intel) will now use
a shadow since the register is write-only.
3. Fixed so that USER1 also will show the state of the
PAPER_AT_PRESENTER sensor in EPP-mode on CPLD-printers.
4. Parallel Tx-register is cleared when new request is received to ensure
that old answer is NOT sent.
Note • Specification subject to changes without notice.
Table 10 • Firmware History (Continued)
FW Version Change
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