SPC8104 S-MOS Systems, SPC8104 Datasheet - Page 66

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

7.12 Software Initiated Suspend Mode Signal Timing
Tv
Ty
Hardware Functional Specification
Symbol
SP1-40
t1
t2
t3
t4
t5
SPC81084 outputs
SPC8104 input
LCAS#, UCAS#
YD,UD[3:0],
LD[3:0],WF
XSCL,LP,
= internal vertical retrace period
= 327680Ts if CLKI or self-refresh mode (approximately 13.6ms for 24MHz)
= 1024Tm if MEMEN refresh clock source is selected
= 512Tp if PDCLK refresh clock source is selected
= YD period, typically 14.8ms
Power Save Register IOW# command negated (valid Power
Save Mode set) to LCDPWR# negated
Power Save Register IOW# command negated (valid Power
Save Mode set) to LCD interface signals high-impedance, or
driven low (as selected by AUX[02] bit 1)
Power Save Register IOW# command negated (return to
active mode) to LCD interface signals active
LCD interface signals active to LCDPWR# asserted
LCD interface signals high-impedance or low to LCAS#,
UCAS# asserted (to initialize DRAM self-refresh mode)
S-MOS Systems, Inc. • Tel: [phone] • Fax: [phone] • http://www.smos.com
LCDPWR#
Figure 15 : Software Initiated Suspend Mode Signal
IOW#
Table 0-30 Software Initiated Suspend Mode Signal Timing
Parameter
active
t1
X15-SP-001-08.1
t2
t5
TimingSource: a000079.cdr
or Low (as selected by AUX[02] bit1)
Min
2Ty
2Ty
Ts
Hi-Z
Typ
t3
4Ts+30
4Ts+30
Max
3Ty
t4
active
412-1.0
SPC8104
Units
ns
ns
ns
ns
ns