T89C5115 ATMEL Corporation, T89C5115 Datasheet - Page 95

• Manufacturer Part Number: T89C5115
• Description: Low Pin Count 8-bit MCU with A/D Converter and 16-Kbytes of Flash Memory
• Manufacturer: ATMEL Corporation

AC Parameters
Explanation of the AC
Symbols
Serial Port Timing – Shift
Register Mode
4128A–8051–04/02
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.
Example: T
T
T
( Load Capacitance for all outputs = 60 pF.)
Table 70 and Table 74 give the description of each AC symbols.
Table 71, Table 72 and Table 73 give for each range the AC parameter.
Table 72 gives the frequency derating formula of the AC parameter for each speed
range description. To calculate each AC symbols. Take the x value and use this value in
the formula.
Example: T
x = 30 ns
T = 50 ns
T
Table 70. Symbol Description (F = 40 MHz)
Table 71. AC Parameters for a Fix Clock (F = 40 MHz)
Symbol
T
T
T
T
T
Symbol
T
T
T
T
T
A
A
CCIV
XLXL
QVHX
XHQX
XHDX
XHDV
XLXL
QVHX
XHQX
XHDX
XHDV
T
= -40°C to +85°C; V
= -40°C to +85°C; V
LLPL
= 4T - x = 170 ns
= Time for ALE Low to PSEN Low.
AVLL
LLIV
and 20 MHz, Standard clock.
= Time for Address Valid to ALE Low.
SS
SS
= 0V; V
= 0V; V
CC
CC
Min
300
200
30
0
= 5V ± 10%; F = 0 to 40 MHz.
= 5V ± 10%.
Parameter
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
T89C5115
Units
ns
ns
ns
ns
ns
95