M16C80 Datasheet, PDF (258/358 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/80 SERIES

M16C/80 Group
28. Electrical characteristics
Memory expansion Mode and Microprocessor Mode Vcc=5V
Refresh Timing (CAS before RAS refresh)
BCLK
RAS
td(BCLK-RAS)
18ns.max
tsu(CAS-RAS)*1
CASL
CASH
DW
td(BCLK-CAS)
18ns.max
*1:It depends on operation frequency.
tsu(CAS-RAS)=(tcyc/2-13)ns.min
tcyc
th(BCLK-RAS)
-3ns.min
th(BCLK-CAS)
-3ns.min
Refresh Timing (Self-refresh)
BCLK
RAS
td(BCLK-RAS)
18ns.max
CASL
CASH
DW
tsu(CAS-RAS)*1
td(BCLK-CAS)
18ns.max
*1:It depends on operation frequency.
tsu(CAS-RAS)=(tcyc/2-13)ns.min
Measuring conditions
• VCC=5V±10%
• Input timing voltage
:Determined with VIH=2.5V, VIL=0.8V
• Output timing voltage
:Determined with VOH=2.0V, VOL=0.8V
tcyc
th(BCLK-RAS)
-3ns.min
th(BCLK-CAS)
-3ns.min
Figure 28.12 VCC=5V timing diagram (11)
Rev.1.00 Aug. 02, 2005 ^{Page 247} of 329
REJ09B0187-0100