FlashFlex51 MCU
SST89C54 / SST89C58
Preliminary Specifications
TLHLL
ALE
TWHLH
PSEN#
TLLDV
TRLRH
TLLWL
RD#
TAVLL
TLLAX
TRLAZ
TRLDV
TRHDZ
TRHDX
PORT 0
A7-A0 FROM RI or DPL
TAVWL
TAVDV
DATA IN
A7-A0 FROM PCL
INSTR IN
PORT 2
P2[7:0] or A15-A8 FROM DPH
A15-A8 FROM PCH
344 ILL F14.3
F
IGURE
28: E
XTERNAL
D
ATA
M
EMORY
R
EAD
C
YCLE
TLHLL
ALE
TWHLH
PSEN#
TLLWL
TWLWH
WR#
TAVLL
TLLAX
TQVWX
TQVWH
TWHQX
PORT 0
A7-A0 FROM RI or DPL
TAVWL
DATA OUT
A7-A0 FROM PCL
INSTR IN
PORT 2
P2[7:0] or A15-A8 FROM DPH
A15-A8 FROM PCH
344 ILL F15.3
F
IGURE
29: E
XTERNAL
D
ATA
M
EMORY
W
RITE
C
YCLE
T
ABLE
15: E
XTERNAL
C
LOCK
D
RIVE
Symbol
Parameter
12MHz
Min
Max
1/T
CLCL
T
CHCX
T
CLCX
T
CLCH
T
CHCL
Oscillator Frequency
High Time
Low Time
Rise Time
Fall Time
Oscillator
33MHz
Min
Max
Variable
Min.
Max.
0
33
0.35T
CLCL
0.65T
CLCL
0.35T
CLCL
0.65T
CLCL
Units
20
20
5
5
MHz
ns
ns
ns
ns
344 PGM T15.2
漏 2000 Silicon Storage Technology, Inc.
44
344-2 8/00