Epson Stylus Photo 820 - Page 127

EPSON Stylus PHOTO 810/820 Revision A
Appendix Connector Summary 127
Table 7-4. CN7 - PF Motor
Pin Signal Name I/O Function
1 PFA Out Phase drive signal (A)
2 PFB Out Phase drive signal (-A)
3 PF-A Out Phase drive signal (B)
4 PF-B Out Phase drive signal (-B)
Table 7-5. CN8 - Printhead
Pin Signal Name I/O Function
1 GND --- Ground
2 COM --- Head drive pulse (
trapezoid waveform)
3 GND --- Ground
4 VHV --- -42 V power supply for nozzle selector
5 GND --- Ground
6 NCHG Out All nozzle fire selection pulse
7 GND --- Ground
8 LAT Out Head data latch pulse output
9 VDD3.3 --- Logic power supply (+3.3V)
10 CSCK Out Clock signal for EEPROM
11 COI In I/C detection signal
12 CRST Out Reset signal for EEPROM
13 THM In Thermistor detection signal
14 CSDA In/Out CSIC data signal for EEPROM
15 CVDD --- Logic power supply (+3.3V) for EEPROM
Table 7-6. CN9 - Printhead
Pin Signal Name I/O Function
1 SP Out Select signal for CH signal
2 SI1 Out Print data output (1)
3 SI2 Out Print data output (2)
4 SI3 Out Print data output (3)
5 SI4 Out Print data output (4)
6 SI5 Out Print data output (5)
7 SI6 Out Print data output (6)
8 GND --- Ground
9CHOut
Waveform selection signal for MS shot &
Variable shot
10 GND --- Ground
11 SCK Out Serial Clock
12 GND --- Ground
13 COM --- Head drive pulse (
trapezoid waveform)
14 GND --- Ground
15 COM --- Head drive pulse (
trapezoid waveform)
Table 7-7. CN12 - CR Motor
Pin Signal Name I/O Function
1 CRA Out Phase drive signal (A)
2 CRB Out Phase drive signal (-A)
3 CR-A Out Phase drive signal (B)
4 CR-B Out Phase drive signal (-B)