SPEAr300
6.2.2
CLCD timing characteristics divided clock
Figure 15. CLCD waveform with CLCP divided
CLCP
Tclock
Tmax
Timing requirements
Tmin
CLD[23:0],CLAC,CLLE,CLLP,
CLFP ,CLPOWER
Tstabl e
Tf
Tr
Figure 16. CLCD block diagram with CLCP divided
t1
CLCDCLK
D Q SET
Q CL R
D Q SET
CLD[23:0],CLAC,CLLE,
CLLP,CLFP,CLPOWER
t2
CLCP
t3
Q CL R
Table 105.
Table 30. CLCD timings with CLCP divided
Parameter
Value
tCLOCK divided max
tCLOCK divided max rise (tr)
tCLOCK divided max (tf)
tmin
tmax
tSTABLE
12 ns
0.81 ns
0.87 ns
-0.49 ns
2.38 ns
9.13 ns
Frequency
83.3 MHz
Note: 1 tSTABLE = tCLOCK direct max - (tmax + tmin)
2 For tmax the maximum value is taken from the worst case and for tmin the minimum value is
taken from the best case.
3 CLCP should be delayed by {tmax + [tCLOCK direct max - (tmax + tmin)]/2} = 6.945 ns
Doc ID 16324 Rev 2
61/83