Figure 1-5. Negotiation Timing Chart; Figure 1-6. Data Transfer Timing Chart - Epson EPL-9000 Service Manual

Service Manual
Figure 1-5 shows the negotiation timing chart.
DATA
STROBE
AUTO-FEED
BUSY
PE
ERROR
Note 1: The signal is set to HIGH when not sending data.
The signal is set to LOW when sending data.
Note 2: The signal is set to HIGH, if extension request value was
Note3: HB DA: Host Busy Data Available
HB DNA: Host Busy Data Not Available
Figure 1-6 shows the data transfer timing chart.
DATA
STROBE
AUTO-FEED
BUSY Peripheral Busy
PE
ERROR
Note 1: The signal is set to HIGH when not sending data.
The signal is set to LOW when sending data.
Note 2: The signal is set to HIGH if the extension request value is
Note 3: HB DA: Host Busy Data Available
HB DNA: Host Busy Data Not Available
Rev.
Peripheral Busy Status
Current Peripheral
Current Peripheral
Compatibility

Figure 1-5. Negotiation Timing Chart

Bit 3
Bit 2
Bit 1
Bit O
HB DA

Figure 1-6. Data Transfer Timing Chart

or 04 h
\
/
Note 2
\
/
\
HB
Negotiation
HB DNA
(Note 3)
Bit 7 Peripheral
Bit 6
N&e 1
Bit 5 N&e 2
Bit 4
Negotiation
HB
DNA
HB
(Note 3)
General Description
:
Idle or
Transfer
Status
1-15