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Circuit
INKJET HEAD CONTROLLER
• HGA [13:1] : U15 - 1 ~ 11,159,160, Gate Address,
Active Low
• HOE [16:1] : U25 - 13 ~ 29, Head Enable, Active
High.
• /FAULT-TEST : U16 - 127, Head Fault Test, Active
Low
• /M_HEAD_EN : U16 - 129, Mono Head Enable,
Active Low
• /C_HEAD_EN : U16 - 128, Color Head Enable,
Active Low
4-6
This part produces major control signals used to
drive INKJET head. It consists of signals to drive
head nozzles, /HGA[13:1], HOE[16:1], /FAULT-
TEST, /M_HEAD-EN, and C_HEAD-EN, and
consists of signals to check the status of the head,
HEAD-DATA.
It has double height print head, system 208 nozzles
for mono and 192 nozzles for color, and uses
/HGA[13:1], HOE[16:1] signals and /HEAD-EN to
drive these nozzles. Fig.4-1-6 is timing diagram of
each signal.
Fig.4-1-6 Timing Diagram to Drive Head
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