CY14B101LA CYPRESS [Cypress Semiconductor], CY14B101LA Datasheet - Page 6

• Manufacturer Part Number: CY14B101LA
• Description: 1 Mbit (128K x 8/64K x 16) nvSRAM
• Manufacturer: CYPRESS [Cypress Semiconductor]

Table 2. Mode Selection (continued)
Preventing AutoStore
The AutoStore function is disabled by initiating an AutoStore
disable sequence. A sequence of read operations is performed
in a manner similar to the Software STORE initiation. To initiate
the AutoStore disable sequence, the following sequence of CE
controlled read operations must be performed:
The AutoStore is reenabled by initiating an AutoStore enable
sequence. A sequence of read operations is performed in a
manner similar to the Software RECALL initiation. To initiate the
AutoStore enable sequence, the following sequence of CE
controlled read operations must be performed:
Document #: 001-42879 Rev. *C
1. Read address 0x4E38 Valid READ
2. Read address 0xB1C7 Valid READ
3. Read address 0x83E0 Valid READ
4. Read address 0x7C1F Valid READ
5. Read address 0x703F Valid READ
6. Read address 0x8B45 AutoStore Disable
1. Read address 0x4E38 Valid READ
2. Read address 0xB1C7 Valid READ
3. Read address 0x83E0 Valid READ
4. Read address 0x7C1F Valid READ
5. Read address 0x703F Valid READ
6. Read address 0x4B46 AutoStore Enable
CE
L
L
L
WE
H
H
H
OE, BHE, BLE
L
L
L
PRELIMINARY
[3]
A
0xB1C7
0x7C1F
0xB1C7
0x7C1F
0x8FC0
0xB1C7
0x7C1F
0x4E38
0x83E0
0x703F
0x4B46
0x4E38
0x83E0
0x703F
0x4E38
0x83E0
0x703F
0x4C63
15
- A
If the AutoStore function is disabled or reenabled, a manual
STORE operation (Hardware or Software) must be issued to
save the AutoStore state through subsequent power down
cycles. The part comes from the factory with AutoStore enabled.
Data Protection
The CY14B101LA/CY14B101NA protects data from corruption
during low voltage conditions by inhibiting all externally initiated
STORE and write operations. The low voltage condition is
detected
CY14B101LA/CY14B101NA is in a write mode (both CE and WE
are LOW) at power up, after a RECALL or STORE, the write is
inhibited until the SRAM is enabled after t
active). This protects against inadvertent writes during power up
or brown out conditions.
Noise Considerations
Refer to CY application note AN1064.
0
[9]
AutoStore Enable
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Read SRAM
when
Nonvolatile
Nonvolatile
STORE
Recall
Mode
CY14B101LA, CY14B101NA
V
CC
is
Output High Z
Output High Z
Output Data
Output Data
Output Data
Output Data
Output Data
Output Data
Output Data
Output Data
Output Data
Output Data
Output Data
Output Data
Output Data
Output Data
Output Data
Output Data
less
I/O
than
LZHSB
V
SWITCH
Active I
(HSB to output
Active
Active
Page 6 of 24
Power
.
CC2
[10]
[10]
If
[10]
the
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