Epson EPL-N4000 - Page 255

EPSON EPL-N4000/EPL-N4000+ Chapter 7 Appendix
Rev.B 241
Figure 7-12. C262 Main Controller
↔
ESS PWB
↔
MCU PWB
Table 7-10. Signal Name
Signal Name Description
/SBSY Status bus
y
si
g
nal. Low=Transmittin
g
si
g
nal. Hi
g
h=Not
transmittin
g
/STA Status from MCU to ESS
/CMD Command from ESS to MCU
/PCLK Clock si
g
nal which is sent from the printer to ESS, and
command timin
g
for sendin
g
the status. Clock speed is
9600 bps
/CCLK Clock si
g
nal for status and command timin
g
- ESS to
MCU. Clock speed 9.6kHz ~ 500kHz
/CBSY Command bus
y
si
g
nal - ESS to MCU
Low=ESS is transmittin
g
command. Hi
g
h=ESS is not
transmittin
g
.
/PPRDY Status indicatin
g
MCU initialization is complete and
printer is On-Line. Low=Printer initialization complete.
Hi
g
h=Printer initialization not complete
/CPRDY Status indicatin
g
ESS initialization is complete.
Low=ESS initialization complete. Hi
g
h=ESS initialization
not complete
/RDY Status indicatin
g
that the MCU is read
y
to accept control
commands. Low=Accept commands. Hi
g
h=I
g
nore
commands
/START Command from ESS to the MCU to be
g
in a print c
y
cle.
Low=Start. Hi
g
h=Do not start. Starts print c
y
cle onl
y
when /RDY is also Low.
/PRFD Command from the ESS to the MCU to feed paper
/TOP Video data s
y
nch si
g
nal from MCU to ESS
DSEL Command to select the No Paper si
g
nal
/BD Video data s
y
nch si
g
nal from MCU to ESS
VOUT Video data si
g
nal from the ESS Low=Black, Hi
g
h=White