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| 7643_06 Datasheet, PDF (339/424 Pages) Renesas Technology Corp – 8-BIT SINGLE-CHIP MICROCOMPUTER | |||
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7643 Group
APPENDIX
3.1 Electrical characteristics
Ï
AB15 to AB8
AB7 to AB0
SYNCOUT
RD,WR
DMAOUT
RDY
HOLD
(at entering)
HLDA
HOLD
(at releasing)
HLDA
<CPU read>
DB0 to DB7
<CPU write>
DB0 to DB7
EDMA
tWH(Ï)
0.5VCC
td(Ï-AH)
tC(Ï)
tWL(Ï)
tv(Ï-AH)
0.5VCC
td(Ï-AL)
0.5VCC
td(Ï-SYNC)
0.5VCC
td(Ï-DMA)
td(Ï-WR)
td(Ï-RD)
0.5VCC
0.5VCC
n cycles of Ï
tsu(RDY-Ï) th(Ï-RDY)
0.8VCC
0.2VCC
tsu(HOLD-Ï) th(Ï-HOLD)
0.8VCC
0.2VCC
tv(Ï-AL)
tv(Ï-SYNC)
tv(Ï-WR)
tv(Ï-RD)
tv(Ï-DMA)
td(Ï-HLDAL)
0.5VCC
tsu(HOLD-Ï) th(Ï-HOLD)
0.8VCC
0.2VCC
td(Ï-HLDAH)
td(Ï-EDMA)
0.5VCC
0.5VCC
td(Ï-DB)
tsu(DB-Ï)
0.8VCC
0.2VCC
th(Ï-DB)
tv(Ï-DB)
0.5VCC
tv(Ï-EDMA)
0.5VCC
Fig. 3.1.6 Timing diagram (4); Memory expansion and microprocessor modes
Rev.2.00 Aug 28, 2006 page 16 of 98
REJ09B0133-0200
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