SPC8104 S-MOS Systems, SPC8104 Datasheet - Page 67

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

7.13 Hardware Initiated Suspend Mode Signal Timing
Tv
SPC8104
Symbol
t3a
t3b
Ty
412-1.0
SPC8104 outputs
t1
t2
t4
t5
SPC8104 input
LCAS#, UCAS#
= 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
SUSPEND# asserted to LCDPWR# negated
SUSPEND# asserted to LCD interface signals high-
impedance, or driven low (as selected by AUX[02] bit 1)
SUSPEND# negated to LCD interface signals driven
(CLKI selected as refresh clock source)
SUSPEND# negated to LCD interface signals driven
(self-refresh mode, MEMEN, or PDCLK selected as
refresh clock source)
LCD interface signals driven to LCDPWR# asserted
LCD interface signals high-impedance or low to LCAS#,
UCAS# asserted (to initialize DRAM self-refresh mode)
XSCL, LP,
YD,UD[3:0],
LD[3:0],WF
SUSPEND#
LCDPWR#
Figure 16 : Hardware Initiated Suspend Mode Signal
S-MOS Systems, Inc. • Tel: [phone] • Fax: [phone] • http://www.smos.com
Table 0-31 Hardware Initiated Suspend Mode Signal Timing
Parameter
active
t1
X15-SP-001-08.1
t2
t5
or Low (as selected by AUX[02] bit1)
TimingSource: a000080.cdr
Tv+3Ts
Min
2Ty
2Ty
Ts
Hardware Functional Specification
Hi-Z
Typ
t3
Max
+4Ts
4Ts
3Ty
4Ts
2Tv
t4
Units
active
ns
ns
ns
ns
ns
ns
SP1-41