Datasheet

153
A/T89C51CC01
4129N–CAN–03/08
Table 130. AC Parameters for a Fix Clock (F = 40 MHz)
Table 131. AC Parameters for a Variable Clock
Shift Register Timing
Waveforms
External Clock Drive
Characteristics (XTAL1)
Table 132. AC Parameters
Symbol Min Max Units
T
XLXL
300 ns
T
QVHX
200 ns
T
XHQX
30 ns
T
XHDX
0 ns
T
XHDV
117 ns
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
VALIDVALID
INPUT DATA
VALID
0 1 2 3 4 5 6 87
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 %