BG12864B feature mechanical data item module dimension viewing area dot size dot pitch standard value unit pin assignment pin symbol function 1 2 3 4 5 6 7~14 gnd + 5v(+3v option) contrast adjustment register selection signal data read/write h->l enablesignal vss vdd vo rs r/w e db0~7 mm mm mm mm 93.0 x 70.0 72.0 x 40.0 0.48 x 0.48 0.52 x 0.52 dimension bo lymin 1. cob with metal frame 2. built-in controller st7920 (128x64 dots matrix mode or 16x16 dots big5/gb chinese mode , or 8x16 dots ascii mode) 3. +5v single power supply 4. 1/32 duty cycle 5. option: +3v single power supply 6. option: led array/edge b/l, el b/l 15 16 power supply for b/l (gnd) a k 17 18 reset lcd module negative voltage output +7.5v /rst vee input voltage supply current lcd driving voltage led forward voltage led forward current vdd idd vdd-vo vf if vdd = +5v vdd = +5v 25 c 5.0 9.7 6.0 4.2 330 v ma v v ma typical value electronic characteristics o 25 c o 25 c o item symbol condition unit el power voltage vel vel=110vac/400hz v data bus line power supply for b/l (+) 19.08 p2.54*17=43.18 70.0 0.5 1.5 50.2 40.0(va) 33.24(aa) 88.0 18-?1.0 pth 1.8 2.5 1.6 5.08 72.0(va) 93.0 0.5 80.0 66.52(aa) 10.5 7.0 13.24 18.38 15.0 9.9 2.5 32.46 28.0 14.0 2.5 65.0 4-?1.0 pth 4-?2. 5pth 4-?6.5 pad 0.48 0.52 0.48 0.52 dot size scale 10/1 18 k a 13.6(led b/l) 9.7(el or no b/l) 9.0(led b/l) 5.1(el or no b/l) 1
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