T89C51CC02 Atmel, T89C51CC02 Datasheet - Page 133

• Manufacturer Part Number: T89C51CC02
• Description: 8-Bit MCU
• Manufacturer: Atmel

19.4. AC Parameters
19.4.1. Explanation of the AC Symbols
Each timing symbol has 5 characters. The first character is always a “T” (stands for time). The other characters,
depending on their positions, stand for the name of a signal or the logical status of that signal. The following is
a list of all the characters and what they stand for.
T
T
(Load Capacitance for all outputs = 60 pF.)
each AC symbols. take the x value and use this value in the formula.
19.4.2. Serial Port Timing - Shift Register Mode
Rev.A - May 17, 2001
Table 29 give the frequency derating formula of the AC parameter for each speed range description. To calculate
T
T
T
T
T
A
A
XLXL
QVHX
XHQX
XHDV
XHDX
= -40 C to +85 C; V
= -40 C to +85 C; V
Symbol
SS
SS
Symbol
T
T
T
T
T
Table 28. AC Parameters for a Fix Clock (F= 40 MHz)
QVHX
XHQX
XHDX
XHDV
XLXL
= 0 V; V
= 0 V; V
Table 27. Symbol Description (F= 40 MHz)
CC
CC
= 5 V 10% ; F = 0 to 40 MHz.
= 5 V
Preliminary
Min
300
200
30
0
10%.
Serial port clock cycle time
Output data set-up to clock rising edge
Output data hold after clock rising edge
Input data hold after clock rising edge
Clock rising edge to input data valid
Max
117
T89C51CC02
Parameter
Units
ns
ns
ns
ns
ns
133