8 ELECTRICAL CHARACTERISTICS
A-92 EPSON S1C33L03 PRODUCT PART
DRAM CAS-before-RAS refresh cycle
BCLK
#RAS
#HCAS/
#LCAS
#WE
CBR refresh cycle
C
CBR1
C
CBR2
C
CBR3
t
RASD2
t
RASD1
t
CASD2
t
CASD1
DRAM self-refresh cycle
BCLK
#RAS
#HCAS/
#LCAS
Self-refresh mode setup Self-refresh mode
tCASD2
Self-refresh mode canceration
tRASD2tRASD1
tCASD1
6-cycle precharge
(Fixed)
SDRAM clock
OSC3
(High-speed clock)
BCLK
(SDRAM clock output)
t
C3
t
CBD =
t
CBH/
t
C3
t
CBD =
t
CBH/
t
C3
BCLK
(SDRAM clock output)
t
C3
t
CBH
t
CBH
(1) #X2SPD = high (CPU clock : SDRAM clock = 1 : 1)
(2) #X2SPD = low (CPU clock : SDRAM clock = 2 : 1)
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