CY14B104KA データシートの表示（PDF） - Cypress Semiconductor
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コンポーネント説明
メーカー
CY14B104KA Datasheet PDF : 31 Pages
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PRELIMINARY
CY14B104KA, CY14B104MA
Table 1. Mode Selection
CE
WE
H
X
L
H
L
L
L
H
L
H
L
H
L
H
OE, BHE, BLE[3]
X
L
X
L
L
L
L
A15 - A0[6]
X
X
X
0x4E38
0xB1C7
0x83E0
0x7C1F
0x703F
0x8B45
0x4E38
0xB1C7
0x83E0
0x7C1F
0x703F
0x4B46
0x4E38
0xB1C7
0x83E0
0x7C1F
0x703F
0x8FC0
0x4E38
0xB1C7
0x83E0
0x7C1F
0x703F
0x4C63
Mode
Not Selected
Read SRAM
Write SRAM
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Read SRAM
AutoStore
Disable
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Read SRAM
AutoStore
Enable
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Nonvolatile
Store
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Nonvolatile
Recall
IO
Output High Z
Output Data
Input Data
Output Data
Output Data
Output Data
Output Data
Output Data
Output Data
Power
Standby
Active
Active
Active[7, 8]
Output Data
Output Data
Output Data
Output Data
Output Data
Output Data
Active[7, 8]
Output Data
Output Data
Output Data
Output Data
Output Data
Output High Z
Active ICC2[7, 8]
Output Data
Output Data
Output Data
Output Data
Output Data
Output High Z
Active[7, 8]
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
6. While there are 19 address lines on the CY14B104KA (18 address lines on the CY14B104MA), only the 13 address lines (A14 - A2) are used to control software
modes. Rest of the address lines are don’t care.
7. The six consecutive address locations must be in the order listed. WE must be HIGH during all six cycles to enable a nonvolatile cycle.
8. 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. *J
Page 5 of 31
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