Sharp CE-150 - Page 247

All and more about Sharp PC-1500 at http://www.PC-1500.info
2-1. Outline of LH5801
6
The L.H580 I Mic rop roce ssor is " CMOS static 8-bit microprocess or th at features l ow
po, ve r di ssi patio n p cr forrna ncc inhere nt 10 Civ lO S l .. SJ and hu· ge c apa city data
pr
ocess in g. '.\lot <1n ly th at. it enab le ~ to to configu re a variety of sys .t cn1 s \ Vi th .a fc \v
additi ona l chips because such as the LCD backplate signal gen er ato r. i npu t port. e.xtcrnal
l atch clock. and ti mer a re built in the 1. H5 80 1.
Features of the LH5801
<D 8 -b ii t parallel darn processing
CD Dir ec t 11 ccc ss ing of I 28K b,·tcs
(j) Us <:: of a 6-bytc general purpose register. in addi ti on to the accu m.u l :uor . allows to
con ·1pr ise th re e pa irs of 2 ~ hy t e date poi nte rs .
(•) 9-bit timer cap abi l it y
0 Th ree ki nds of interrupts
• Non-maskable int errup t
• Ma s kab lc inter rup t
• ·ri rncr i nter r upt
© 82 instruction set
0) WAIT functi on (memor y access co ntro l possibl e)
© Clock P <b fo r input po n (8-bit) a nd exte rna l l atc h
CD M emory b<1ck up functi on (BFJ. BF O)
@ LCD backpl at e signal co ntrol
@ Exte rn al cry s ta l co n ne ction for c loc k gl~n c ra ti on
@ ) ~ ed u c i ng pr ogr arn ste ps by n1 e an s of 28-ki nd ~ i n g l t step v ec t or s ul>rout ine jurnp
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