Rainbow Electronics T89C51CC01 - Manual (Page 142)

142
T89C51CC01
Rev. D – 17-Dec-01
Table 103. AC Parameters for a Variable Clock
19.4.8 Shift Register Timing
Waveforms
19.4.9 External Clock Drive
Characteristics (XTAL1) Table 104. AC Parameters
19.4.10 External Clock Drive
Waveforms
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
VALID VALID VALID VALID VALID VALID INPUT DATA 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
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 %
V
CC
-0.5V
0.45V
0.7V
CC
0.2V
CC
-0.1
T
CHCL
T
CLCX
T
CLCL
T
CLCH
T
CHCX