3 crt and tft interface, Figure 9-8, Tft timing diagram – AMD Geode SC1201 User Manual
Page 382: Table 9-15, Tft timing parameters
382
AMD Geode™ SC1200/SC1201 Processor Data Book
Electrical Specifications
32579B
9.3.3
CRT and TFT Interface
Table 9-15 and Figure 9-8 describe the timing of the digital
CRT interface of the SC1200/SC1201 processor. All mea-
surement points in this table are identical to the voltage
measurement levels described in Table 9-11 on page 376.
Note that signals DDC_SCL and DDC_SDA of the CRT
interface are compliant with standard ACCESS.bus timing
and are controlled by software.
Figure 9-8. TFT Timing Diagram
Table 9-15. TFT Timing Parameters
Symbol
Parameter
Min
Max
Unit
Comments
t
OV
TFTD[17:0], TFTDE valid time after
TFTDCK rising edge (multiplexed on IDE)
0
8
ns
t
OV
TFTD[17:0], TFTDE valid time after
TFTDCK rising edge (multiplexed on
Parallel Port)
0
4
ns
t
CLK_RF
TFTDCK rise/fall time between 0.8V and
2.0V
3
ns
Note 1
t
CLK_P
TFTDCK period time (multiplexed on IDE)
25
ns
t
CLK_P
TFTDCK period time (multiplexed on
Parallel Port)
12.5
ns
t
CLK_D
TFTDCK duty cycle
40/60
%
Note 1. Guaranteed by characterization.
t
OV
t
CLK_RF
t
CLK_P
TFTDCK
TFTD[17:0]
TFTDE