Figure 1-5 shows the negotiation timing chart.
Notes:
1. This signal is set to HIGH when no data is being sent.
This signal is set to LOW during sending of data.
2. This signal is set to HIGH if the extension request value was 04h.
3. HB DA: Host Busy Data is Available
HB DNA: Host Busy Data is Not Available
Figure 1-6 shows the data transfer timing chart.
Notes:
1. This signal is set to HIGH when no data is being sent.
This signal is set to LOW during sending of data.
2. This signal is set to HIGH, if extension request value was 04h.
3. HB DA: Host Busy Data is Available
HB DNA: Host Busy Data is Not Available
DATA 00h or 04h
SEL-IN
STROBE
AUTO-FEED
ACKNLG
Peripheral Busy StatusBUSY
Current Peripheral StatusPE Note1
Note 2SLCT
Current Peripheral StatusERROR Note1
Compatibility Negotiation HB DA or
HB DNA
(Note 3)
Idle or
Transfer
Figure 1-5. Negotiation Timing Chart
DATA
SEL-IN
STROBE
AUTO-FEED
ACKNLG
Peripheral Busy StatusBUSY
PE
SLCT
ERROR
HB DA Negotiation
HB DA or
HB DNA
(Note 3)
Idle or
Transfer
Bit 3 Bit 7
Bit 2 Bit 6
Bit 1 Bit 5
Bit 0 Bit 4
Peripheral Busy Status
Note 1
Note 1
Note 2
Figure 1-6. Timing Chart for Data Transfer
EPL-5500 Service Manual General Description
Rev. B 1-13
