CY2318ANZ Cypress Semiconductor, CY2318ANZ Datasheet - Page 3

• Manufacturer Part Number: CY2318ANZ
• Description: 3.3V SDRAM Buffer for Desktop PCs with 4 DIMMs
• Manufacturer: Cypress Semiconductor

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Document #: 38-07181 Rev. *B
Serial Configuration Map
Byte 0:SDRAM Active/Inactive Register
(1 = Active, 0 = Inactive), Default = Active
Bit 7 18
Bit 6 17
Bit 5 14
Bit 4 13
Bit 3 9
Bit 2 8
Bit 1 5
Bit 0 4
• The Serial bits will be read by the clock driver in the following
• Reserved and unused bits should be programmed to “0”.
• Serial interface address for the CY2318ANZ is:
•
•
•
•
Bit
order:
A6
1
Byte 0 - Bits 7, 6, 5, 4, 3, 2, 1, 0
Byte 1 - Bits 7, 6, 5, 4, 3, 2, 1, 0
.
.
Byte N - Bits 7, 6, 5, 4, 3, 2, 1, 0
Pin #
A5
1
SDRAM7 (Active/Inactive)
SDRAM6 (Active/Inactive)
SDRAM5 (Active/Inactive)
SDRAM4 (Active/Inactive)
SDRAM3 (Active/Inactive)
SDRAM2 (Active/Inactive)
SDRAM1 (Active/Inactive)
SDRAM0 (Active/Inactive)
A4
0
A3
1
Description
A2
0
A1
0
A0
1
R/W
----
Byte 1: SDRAM Active/Inactive Register
(1 = Active, 0 = Inactive), Default = Active
Byte 2: SDRAM Active/Inactive Register
(1 = Active, 0 = Inactive), Default = Active
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Bit
Bit
45
44
41
40
36
35
32
31
28
21
--
--
--
--
--
--
Pin #
Pin #
SDRAM17 (Active/Inactive)
SDRAM16 (Active/Inactive)
Reserved, drive to 0
Reserved, drive to 0
Reserved, drive to 0
Reserved, drive to 0
Reserved, drive to 0
Reserved, drive to 0
SDRAM15 (Active/Inactive)
SDRAM14 (Active/Inactive)
SDRAM13 (Active/Inactive)
SDRAM12 (Active/Inactive)
SDRAM11 (Active/Inactive)
SDRAM10 (Active/Inactive)
SDRAM9 (Active/Inactive)
SDRAM8 (Active/Inactive)
Description
Description
CY2318ANZ
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