TS87C51RD2 ATMEL Corporation, TS87C51RD2 Datasheet - Page 62

• Manufacturer Part Number: TS87C51RD2
• Description: (TS8xC51Rx2) High Performance 8-bit Microcontroller
• Manufacturer: ATMEL Corporation

11.5
11.5.1
62
AC Parameters
AT/TS8xC51Rx2
Explanation of the AC Symbols
Figure 11-3. I
Figure 11-4. I
Figure 11-5. Clock Signal Waveform for I
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 sta-
tus of that signal. The following is a list of all the characters and what they stand for.
Example:T
T
T
ranges.
A
A
= 0 to +70°C (commercial temperature range); V
= -40°C to +85°C (industrial temperature range); V
R e s e t = V s s a f t e r a h i g h p u l s e
d u r i n g a t l e a s t 2 4 c l o c k c y c l e s
T
LLPL
R e s e t = V s s a f t e r a h i g h p u l s e
d u r i n g a t l e a s t 2 4 c l o c k c y c l e s
AVLL
= Time for ALE Low to PSEN Low.
V
= Time for Address Valid to ALE Low.
CC
CC
CC
T
-0.5V
0.45V
CLOCK
SIGNAL
CHCL
Test Condition, Idle Mode
Test Condition, Power-Down Mode
(NC)
T
CLCH
(NC)
= T
RST
XTAL2
XTAL1
V
CHCL
SS
V
RST
XTAL2
XTAL1
= 5ns.
SS
V
T
EA
CC
CLCH
I
P0
CC
V
EA
V
CC
P0
I
CC
0.7V
CC
0.2V
V
CC
V
CC
CC
CC
CC
V
CC
Tests in Active and Idle Modes
-0.1
SS
= 0 V; V
SS
All other pins are disconnected.
All other pins are disconnected.
= 0 V; V
CC
= 5 V ± 10%; -M and -V ranges.
CC
= 5 V ± 10%; -M and -V
4188E–8051–08/06