SPC8104 S-MOS Systems, SPC8104 Datasheet - Page 61

• Manufacturer Part Number: SPC8104
• Description: VGA LCD CONTROLLER
• Manufacturer: S-MOS Systems

SPC8104
Symbol
t4a
t4b
t4c
t5a
t5b
t5c
t6a
t6b
t6c
These timing values apply to CAS-before-RAS refresh cycles occurring only during Suspend
mode where the Sequencer is stopped and the refresh timing is being generated from the
selected CLKI input, from MEMEN input, or from PDCLK input. These values also apply to self-
refresh mode.
412-1.0
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, 32kHz PDCLK
input used as refresh clock source)
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,
32kHz PDCLK input used as refresh clock source)
Suspend Mode refresh period (CLKI used as refresh
source)
Suspend Mode refresh period (MEMEN used as refresh
source)
Suspend Mode refresh period (Sequencer stopped, 32kHz
PDCLK input used as refresh clock source)
S-MOS Systems, Inc. • Tel: [phone] • Fax: [phone] • http://www.smos.com
Table 0-27 DRAM Refresh Timing II (Sequencer stopped)
Parameter
X15-SP-001-08.1
320Ts-20
0.5Tp-5
3Ts-10
Tml-44
4Ts-10
Tml-10
Tm-10
1.5Ts
Min
107
Ts
12
92
Hardware Functional Specification
Typ
2560Ts-20
8Tm-10
4Tp-5
Max
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
SP1-35