SST89V54RD2 Silicon Storage Technology, Inc., SST89V54RD2 Datasheet - Page 70

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

Data Sheet
TABLE 14-8: External Clock Drive
©2007 Silicon Storage Technology, Inc.
Symbol
1/T
T
T
T
T
T
CLCL
CHCX
CLCX
CLCH
CHCL
FIGURE 14-4: External Data Memory Write Cycle
FIGURE 14-5: External Clock Drive Waveform
CLCL
PORT 0
PORT 2
PSEN#
WR#
ALE
Parameter
Oscillator Frequency
High Time
Low Time
Rise Time
Fall Time
V
DD
0.45 V
- 0.5
A0-A7 FROM RI or DPL
T
T
LHLL
AVLL
P2[7:0] or A8-A15 FROM DPH
T
AVWL
0.2 V
0.7V
T
T
T
DD
LLAX
T
QVWX
DD
CHCL
LLWL
- 0.1
8.75
8.75
Min
25
40MHz
T
70
DATA OUT
QVWH
T
T
WLWH
CLCX
Max
10
10
SST89V54RD2/RD / SST89V58RD2/RD
T
CLCL
T
T
0.35T
0.35T
Oscillator
T
T
WHQX
CLCH
CHCX
WHLH
A0-A7 FROM PCL
Min
0
CLCL
CLCL
A8-A15 FROM PCH
1255 F38.0
Variable
0.65T
0.65T
Max
INSTR IN
40
FlashFlex MCU
1255 F37.0
CLCL
CLCL
S71255-10-000
T14-8.0 1255
Units
MHz
ns
ns
ns
ns
ns
12/07