SST89V54RD2 Silicon Storage Technology, Inc., SST89V54RD2 Datasheet - Page 68

• Manufacturer Part Number: SST89V54RD2
• Description: Flashflex51 Mcu
• Manufacturer: Silicon Storage Technology, Inc.

Data Sheet
TABLE 14-7: AC Electrical Characteristics (Continued) (2 of 2)
Explanation of 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.
For example:
©2007 Silicon Storage Technology, Inc.
Symbol
T
T
T
T
T
T
T
AVWL
LLWL
WHQX
QVWH
QVWX
RLAZ
WHLH
1. Calculated values are for x1 Mode only
T
T
A: Address
C: Clock
D: Input data
H: Logic level HIGH
I:
L: Logic level LOW or ALE
P: PSEN#
AVLL
LLPL
Instruction (program memory contents)
= Time from Address Valid to ALE Low
= Time from ALE Low to PSEN# Low
Parameter
ALE Low to RD# or WR# Low
Address to RD# or WR# Low
Data Hold After WR#
Data Valid to WR# High
Data Valid to WR# High to Low
Transition
RD# Low to Address Float
RD# to WR# High to ALE High
T
A
= -40°C to +85°C, V
DD
16 MHz (x2 Mode)
33 MHz (x1 Mode)
Min
142
= 2.7-3.6V@33MHz, 4.5-5.5V@40MHz, V
66
46
10
3
5
Max
116
55
0
1
68
20 MHz (x2 Mode)
40 MHz (x1 Mode)
Min
125
60
70
10
SST89V54RD2/RD / SST89V58RD2/RD
5
5
Q: Output data
R: RD# signal
T: Time
V: Valid
W: WR# signal
X: No longer a valid logic level
Z: High Impedance (Float)
Max
Oscillator
90
40
0
1
3T
3T
4T
4T
7T
7T
T
T
T
T
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
T
CLCL
Min
- 27 (3V)
- 20 (5V)
- 25 (3V)
- 15 (5V)
- 25 (3V)
- 15 (5V)
- 75 (3V)
- 30 (5V)
- 70 (3V)
- 50 (5V)
- 20
SS
Variable
= 0V
3T
3T
FlashFlex MCU
T
T
CLCL
CLCL
CLCL
CLCL
S71255-10-000
Max
+ 25 (3V)
+ 15 (5V)
+ 25 (3V)
+ 15 (5V)
0
T14-7.0 1255
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
12/07