Epson LQ-510 Technical Manual page 83

REV.-A
In the case of 1-2 phase excitation, Figure 2-49 shows the excitation signal input circuit. When the Td ter-
minal is LOW, the SLA702M can cut off the output current. By using this function, the unaltered 2-phase
excitation signal can cause the 1-2 phase excitation to be ON 3/8ths of the time, which is a suitable value.
Figure 2-50 shows the timing chart.
LQ-510
Phase A-"""'
Figure 2-49. Phase Data Input Circuit (1-2 Phase)
Figure 2-50. Phase Signal Timing Chart (1-2 Phase)
PRINCIPLES OF OPERATION
2-41