SPC8106 S-MOS Systems, SPC8106 Datasheet - Page 81

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

7.9
7.10 DRAM Refresh Timing II
SPC8106
Symbol
Figure 12 : DRAM Refresh Timing I (generated from CLKI, Sequence
These timing values apply to CAS-before-RAS refresh cycles occurring during all active modes,
and all Power Save modes where the Sequencer is not halted (Power Save Mode 1, Power
Save Mode 2 state 1, and Power Save Mode 5).
411-1.0
t1
t2
t3
t4
t5
t6
DRAM Refresh Timing I
RAS# high pulse width
RAS# low pulse width
LCAS#, UCAS# high pulse width
LCAS#, UCAS# setup to RAS# asserted
(CAS-before-RAS refresh)
LCAS#, UCAS# low pulse width
LCAS#, UCAS# negated to RAS# asserted
LCAS#,
UCAS#
SPC8106 outputs
SPC8106 outputs
RAS#
LCAS#,
UCAS#
RAS#
Figure 13 : DRAM Refresh Timing II (Sequencer
Table 0-28 DRAM Refresh Timing I (generated from CLKI, Sequence running
S-MOS Systems, Inc. • Tel: [phone] • Fax: [phone] • http://www.smos.com
t1
t3
t1
t2
Parameter
t3
t4
X12-SP-001-07
t5
t5
t2
t4
stopped)source: 8106_refresh2_01.can
t6
3.5Ts+3
0.5Ts-5
2.5Ts-8
2Ts-10
4Ts-3
Ts-4
Min
running)source:8106_refresh_01.can
t6
Hardware Functional Specification
Typ
Max
Units
ns
ns
ns
ns
ns
ns
SP1-39