![Canon Color Bubble Jet BJC-5000 Series Скачать руководство пользователя страница 80](http://html.mh-extra.com/html/canon/color-bubble-jet-bjc-5000-series/color-bubble-jet-bjc-5000-series_service-manual_61880080.webp)
2.1.2 Nibble mode
In the nibble mode, the printer transfers data twice to the host computer in 4-bit
blocks. The data is transferred with the PtrClk signal and HostBusy signal
handshakes.
After the printer confirms the falling edge of the HostBusy signal, it prepares the 8-bit
data, makes the PtrClk signal go from HIGH to LOW, and outputs the lower 4 bits on
the control signal line. After the PtrClk signal goes from HIGH to LOW, the host
computer loads the data and makes the HostBusy signal go from LOW to HIGH. After
the printer confirms the falling edge of the HostBusy signal for the second time, it
outputs the higher 4 bits on the control signal line.
If there is no data to be sent to the host computer after the HostBusy signal goes from
LOW to HIGH, the printer makes the DataAvail signal go from LOW to HIGH and is
put on standby status for the next data transfer. (The falling edge indicates a LOW
and the rising edge indicates a HIGH.)
Part 4: Technical Reference
4-8
BJC-5000
HostBusy
DataAvail
PtrClk
Bit0
Bit4
Bit1
Bit5
Bit2
Bit6
Bit3
Bit7
Xflag
AckDataReq
PtrBusy
Min. 45ms
Max. 35ms
Max. 35ms
Figure 4-8 Interface Timing (Nibble Mode)
Содержание Color Bubble Jet BJC-5000 Series
Страница 2: ...0898 SC 0 55 0 ...
Страница 3: ......
Страница 14: ......
Страница 28: ......
Страница 48: ...Part 2 Product Specifications BJC 5000 2 20 This page intentionally left blank ...
Страница 50: ......
Страница 72: ......
Страница 116: ...Part 4 Technical Reference 4 44 BJC 5000 This page intentionally left blank ...
Страница 118: ......
Страница 160: ......
Страница 161: ...The printing paper contains 70 waste paper PRINTED IN JAPAN IMPRIME AU JAPON CANON INC ...