Sharp CE-150 - Page 327

All and more about Sharp PC-1500 at http://www.PC-1500.info
4-1-2. Block diagram
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4-1-3. Power supplies
(PC-1500, CE-150, CE-158, CE-159)
(j) PC-1500 and its peripheral unit~ (CE - 150. CE- 158. CE -159) ar e dr iven independently
by dr y baucry. Ni -Cd ban ery. or lithium bat1e ry .
When the PC-1500 is conn ec ted with peripheral. R AM. ROM . 1/ 0 PC. C MT l/ F.
and U AR T arc dri ve n by VCC or VGG s upp li ed from the P C- 1500.
0 When the Ni -Cd bnucry of the CE -1 50 is charged capable to dri ve the P C- 1500. power
is s up pl ie d from the CE - 150 to the PC- 15 00 and there fon : the baucr y of thc PC -1500
does no1 co n::;u1 nc. In addition. it drives the driver of the pri r11 er and rc n1 otc cont rol
relays.
0 Th e Ni-Cd b<tll cry of the Cc -1 58 dr ives the dri ve r and receiver of the RS - 232C serial
imerfoce
and the Centronics parallel interface.
0 When the CE -159 is in co nnecti on with the PC-15 00 . it is ope ra ted by VUG of the PC-
15 00 . and it s 1n e1 11or y conte nt s can be retained by the inter na l llth iu rn batte ry \v hc n
disc on nected from the PC -1 500.
87
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