Parallel programming characteristics, Table 30 – Rainbow Electronics AT90S8515 User Manual
Page 85
85
AT90S8515
0841G–09/01
Parallel Programming
Characteristics
Figure 63. Parallel Programming Timing
Notes:
1. Use t
WLWH_CE
for Chip Erase and t
WLWH_PFB
for programming the Fuse bits.
2. If t
WLWH
is held longer than t
WLRH
, no RDY/BSY pulse will be seen.
Table 30. Parallel Programming Characteristics, T
A
= 25
°C ± 10%, V
CC
= 5V ± 10%
Symbol
Parameter
Min
Typ
Max
Units
V
PP
Programming Enable Voltage
11.5
12.5
V
I
PP
Programming Enable Current
250.0
µA
t
DVXH
Data and Control Setup before XTAL1 High
67.0
ns
t
XHXL
XTAL1 Pulse Width High
67.0
ns
t
XLDX
Data and Control Hold after XTAL1 Low
67.0
ns
t
XLWL
XTAL1 Low to WR Low
67.0
ns
t
BVWL
BS Valid to WR Low
67.0
ns
t
RHBX
BS Hold after RDY/BSY High
67.0
ns
t
WLWH
WR Pulse Width Low
67.0
ns
t
WHRL
WR High to RDY/BSY Low
20.0
ns
t
WLRH
WR Low to RDY/BSY High
0.5
0.7
0.9
ms
t
XLOL
XTAL1 Low to OE Low
67.0
ns
t
OLDV
OE Low to DATA Valid
20.0
ns
t
OHDZ
OE High to DATA Tri-stated
20.0
ns
t
WLWH_CE
WR Pulse Width Low for Chip Erase
5.0
10.0
15.0
ms
t
WLWH_PFB
WR Pulse Width Low for Programming the Fuse
Bits
1.0
1.5
1.8
ms
Data & Control
(DATA, XA0/1, BS)
DATA
W
rite
Read
XTAL1
t
XHXL
t
WLWH
t
DVXH
t
XLOL
t
OLDV
t
WHRL
t
WLRH
WR
RDY/BSY
OE
t
XLDX
t
XLWL
t
RHBX
t
OHDZ
t
BVWL