m69ar048b STMicroelectronics, m69ar048b Datasheet - Page 24

• Manufacturer Part Number: m69ar048b
• Description: 32 Mbit 2mb X16 1.8v Asynchronous Psram
• Manufacturer: STMicroelectronics

M69AR048B
Table 13. Standby Mode AC Characteristics
Note: 1. Applicable also to Power-up.
Figure 23. Power-Down Programming AC Waveforms
Note: E2 = High.
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t
Symbol
t
t
EHWL
EHEV
CHEL
t
t
t
t
t
EXCH
EHCH
CLEX
EHGL
2. Applicable when 4M, 8M or 16M Partial Power-Down mode is programmed
3. Some data might be written into any address location if tEHWL (min) is not satisfied.
4. The Input Transition Time (t ) at AC testing is 5ns as shown below. If actual t is longer than 5ns, it may violate AC specification
1. All address inputs must be High from Cycle 1 to Cycle 5.
2. PDCADD stands for Power-Down Configuration Address. It must be compliant with the format specified in Table
3. PDCDAT stands for Power-Down Configuration Data. It must be compliant with the format specified in Table
4. t
(4)
of some timing parameters.
data programmed during the Power-Down Program sequence may be incorrect.
programmed during the Power-Down Program sequence may be incorrect.
(1)
(2)
(3)
EHEL
A0-A20
E1
W
LB, UB
DQ0-DQ15
G
after the end of Cycle 6, the Power-Down Program is completed and the device returns to normal operation.
t
t
t
t
CHWX
t
CHHP
t
CHOX
t
Alt.
C2LP
CHH
CHS
CSP
t
E2 Low Setup Time for Power-Down Entry
E2 Low Hold Time after Power-Down Entry
E1 High Hold Time following E2 High after Power-Down Exit
(Deep Power-Down Mode only)
E1 High Hold Time following E2 High after Power-Down Exit
(not in Deep Power-Down Mode)
E1 High Setup Time following E2 High after Power-Down Exit
E1 High to G Invalid Time for Standby Entry
E1 High to W Invalid Time for Standby Entry
Input Transition Time
Cycle 1
MSB 2
RDa
tAVAX
Cycle 2
MSB 2
tAXAV
RDa
Parameter
Cycle 3
MSB 2
RDa
Cycle 4
MSB 2
00
Cycle 5
MSB 2
PDCD
4
tAXAVL
Min
300
M69AR048B
PDCADD 3
10
85
10
10
Cycle 6
1
0
1
80, 85
RDb
4
5
AI07225c
Max
otherwise the data
25
6
otherwise the
Unit
ns
ns
µs
µs
µs
ns
ns
ns