SPC8106 S-MOS Systems, SPC8106 Datasheet - Page 82

• Manufacturer Part Number: SPC8106
• Description: LCD/CRT VGA CONTROLLER
• Manufacturer: S-MOS Systems

Hardware Functional Specification
Symbol
SP1-40
t4a
t4b
t4c
t4d
t5a
t5b
t5c
t5d
t6a
t6b
t6c
t6d
These timing values apply to CAS-before-RAS refresh cycles occurring only during those modes
where the Sequencer is stopped and the refresh timing is being generated from the selected
CLKI input, from MEMEN input, or from PDCLK input (Power Save Mode 2 state 2, Power Save
Mode 4, and Hardware Suspend Mode). These values also apply to self-refresh modes (Power
Save Mode 4, and Hardware Suspend Mode).
t1
t2
t3
RAS# negated to LCAS#, UCAS# asserted
LCAS#, UCAS# high pulse width
LCAS#, UCAS# asserted to RAS# asserted
RAS# low pulse width (Sequencer stopped, selected CLKI
used as refresh clock source)
RAS# low pulse width (Sequencer stopped, MEMEN input
used as refresh clock source)
RAS# low pulse width (Sequencer stopped, 64 kHz PDCLK
input used as refresh clock source)
RAS# low pulse width (Sequencer stopped, 32 kHz PDCLK
input used as refresh clock source, internal clock doubling
enabled)
LCAS#, UCAS# low pulse width (Sequencer stopped,
selected CLKI used as refresh source)
LCAS#, UCAS# low pulse width (Sequencer stopped,
MEMEN input used as refresh clock source)
LCAS#, UCAS# low pulse width (Sequencer stopped, 64
kHz PDCLK input used as refresh clock source)
RAS# low pulse width (Sequencer stopped, 32 kHz used
as refresh source, internal clock doubling enabled)
Power Save Mode 4 SUSPEND# Mode refresh period
(Sequencer stopped, selected CLKI used as refresh source
Power Save Mode 4 SUSPEND# Mode refresh period
(Sequencer stopped, MEMEN input used as refresh clock
source)
Power Save Mode 4 SUSPEND# Mode refresh period
(Sequencer stopped, 64 kHz PDCLK input used as refresh
clock source)
Power Save Mode 4 SUSPEND# Mode refresh period
(Sequencer stopped, 32 kHz used as refresh source,
internal clock doubling enabled)
S-MOS Systems, Inc. • Tel: [phone] • Fax: [phone] • http://www.smos.com
Table 0-29 DRAM Refresh Timing II (Sequencer stopped)
Parameter
X12-SP-001-07
Tph-58
4Ts-58
Tml-58
4Ts-10
384Ts
1.5Ts
0.5Tp
Min
Tph
150
Tml
166
Tm
Tp
Ts
10
Typ
3072Ts
Max
8Tm
8Tp
4Tp
Units
411-1.0
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
us
us
us
us
SPC8106