cy14b101l Cypress Semiconductor Corporation., cy14b101l Datasheet - Page 5

• Manufacturer Part Number: cy14b101l
• Description: 1-mbit 128k X 8 Nvsram
• Manufacturer: Cypress Semiconductor Corporation.

Document #: 001-06400 Rev. *D
Table 1. Mode Selection
Preventing AutoStore
The AutoStore function can be disabled by initiating an
AutoStore Disable sequence. A sequence of read operations
is performed in a manner similar to the software STORE initi-
ation. To initiate the AutoStore Disable sequence, the following
sequence of CE-controlled read operations must be
performed:
The AutoStore can be re-enabled by initiating an AutoStore
Enable sequence. A sequence of read operations is
Notes:
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. The six consecutive address locations must be in the order listed. WE must be HIGH during all six cycles to enable a non-volatile cycle.
2. While there are 17 address lines on the CY14B101L, only the lower 16 lines are used to control software modes.
3. I/O state depends on the state of OE. The I/O table shown assumes OE Low.
CE
H
L
L
L
L
L
L
WE
H
H
H
H
H
X
L
OE
X
X
L
L
L
L
L
PRELIMINARY
A15 - A0
0xB1C7
0x7C1F
0xB1C7
0x7C1F
0xB1C7
0x7C1F
0x8FC0
0xB1C7
0x7C1F
0x4C63
0x4E38
0x83E0
0x703F
0x8B45
0x4E38
0x83E0
0x703F
0x4B46
0x4E38
0x83E0
0x703F
0x4E38
0x83E0
0x703F
X
X
X
performed in a manner similar to the software RECALL initi-
ation. To initiate the AutoStore Enable sequence, the following
sequence of CE-controlled read operations must be
performed:
If the AutoStore function is disabled or re-enabled, a manual
STORE operation (Hardware or Software) needs to be issued
to save the AutoStore state through subsequent power down
cycles. The part comes from the factory with AutoStore
enabled.
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
Not Selected
Read SRAM
Write 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
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Nonvolatile
Nonvolatile
Autostore
Autostore
Disable
Enable
Recall
Mode
Store
Output High Z
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
Output Data
Output Data
Output Data
Output Data
Output Data
Output Data
Output Data
Input Data
I/O
CY14B101L
Page 5 of 19
Standby
Power
Active
Active
Active
Active
Active
Active
[1,2,3]
[1,2,3]
[1,2,3]
[1,2,3]
I
CC2
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