CY14B104K Ver la hoja de datos (PDF) - Cypress Semiconductor
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CY14B104K Datasheet PDF : 29 Pages
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PRELIMINARY
CY14B104K/CY14B104M
Table 1. Mode Selection
CE
WE
H
X
L
H
L
L
L
H
L
H
L
H
L
H
OE
A15 - A0
Mode
IO
Power
X
X
Not Selected Output High Z
Standby
L
X
Read SRAM
Output Data
Active
X
X
Write SRAM
Input Data
Active
L
0x4E38
Read SRAM
Output Data
Active[4,5,6]
0xB1C7
Read SRAM
Output Data
0x83E0
Read SRAM
Output Data
0x7C1F
Read SRAM
Output Data
0x703F
Read SRAM
Output Data
0x8B45
AutoStore
Output Data
Disable
L
0x4E38
Read SRAM
Output Data
Active[4,5,6]
0xB1C7
Read SRAM
Output Data
0x83E0
Read SRAM
Output Data
0x7C1F
Read SRAM
Output Data
0x703F
Read SRAM
Output Data
0x4B46
AutoStore
Output Data
Enable
L
0x4E38
Read SRAM
Output Data Active ICC2[4,5,6]
0xB1C7
Read SRAM
Output Data
0x83E0
Read SRAM
Output Data
0x7C1F
Read SRAM
Output Data
0x703F
Read SRAM
Output Data
0x8FC0
Nonvolatile
Output High Z
Store
L
0x4E38
Read SRAM
Output Data
Active[4,5,6]
0xB1C7
Read SRAM
Output Data
0x83E0
Read SRAM
Output Data
0x7C1F
Read SRAM
Output Data
0x703F
Read SRAM
Output Data
0x4C63
Nonvolatile
Output High Z
Recall
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:
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
The AutoStore is re-enabled 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:
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
If the AutoStore function is disabled or re-enabled, a manual
STORE operation (hardware or software) is issued to save the
AutoStore state through subsequent power down cycles. The
part comes from the factory with AutoStore enabled.
Notes
4. The six consecutive address locations must be in the order listed. WE must be HIGH during all six cycles to enable a nonvolatile cycle.
5. While there are 19 address lines on the CY14B104KA/CY14B104M, only the lower 16 lines are used to control software modes.
6. IO state depends on the state of OE, BHE, and BLE. The IO table shown assumes OE, BHE, and BLE LOW.
Document #: 001-07103 Rev. *I
Page 5 of 29
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