Rainbow Electronics T89C51CC02 - Manual (Page 134)

134 Rev.A - May 17, 2001
Preliminary
T89C51CC02
19.4.3. Shift Register Timing Waveforms
19.4.4. External Clock Drive Characteristics (XTAL1)
Table 30. AC Parameters
Table 29. AC Parameters for a Variable Clock
Symbol Type Standard
Clock
X2 Clock X parameter
for -M range Units
T
XLXL
Min 12 T 6 T ns
T
QVHX
Min 10 T - x 5 T - x 50 ns
T
XHQX
Min 2 T - x T - x 20 ns
T
XHDX
Min x x 0 ns
T
XHDV
Max 10 T - x 5 T- x 133 ns
Symbol Parameter Min Max Units
T
CLCL
Oscillator Period 25 ns
T
CHCX
High Time 5 ns
T
CLCX
Low Time 5 ns
T
CLCH
Rise Time 5 ns
T
CHCL
Fall Time 5 ns
T
CHCX
/T
CLCX
Cyclic ratio in X2 mode 40 60 %
VALID VALID INPUT DATA VALID VALID
0 1 2 3 4 5 6 8 7
ALE
CLOCK
OUTPUT DATA
WRITE to SBUF
CLEAR RI
T
XLXL
T
QVXH
T
XHQX
T
XHDV
T
XHDX SET TI
SET RI
INSTRUCTION
0 1 2 3 4 5 6 7
VALID VALID VALID VALID