cy2277a Cypress Semiconductor Corporation., cy2277a Datasheet - Page 5

• Manufacturer Part Number: cy2277a
• Description: 6x86, K6 Clock Synthesizer/driver For Desktop Mobile Pcs With Intel 82430tx And 2 Dimms Or 3 So-dimms Semiconductor
• Manufacturer: Cypress Semiconductor Corporation.

Byte 1: CPU, 24/48 MHz Active/Inactive
Register (1 = Active, 0 = Inactive), Default = Active
Byte 3: SDRAM Active/Inactive
Register (1 = Active, 0 = Inactive), Default = Active
Byte 5: Peripheral Active/Inactive
Register (1 = Active, 0 = Inactive), Default = Active
Maximum Ratings
(Above which the useful life may be impaired. For user guide-
lines, not tested.)
Supply Voltage ..................................................–0.5 to +7.0V
Input Voltage ............................................ –0.5V to V
Storage Temperature (Non-Condensing) .... –65 C to +150 C
Document #: 38-07332 Rev. *A
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Bit 7 26
Bit 6 27
Bit 5 29
Bit 4 30
Bit 3 32
Bit 2 33
Bit 1 35
Bit 0 36
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Bit
Bit
Bit
Pin #
23
22
--
N/A
38
39
41
42
--
--
--
45
--
--
1
2
Pin #
Pin #
SDRAM7 (Active/Inactive)
SDRAM6 (Active/Inactive)
SDRAM5 (Active/Inactive)
SDRAM4 (Active/Inactive)
SDRAM3 (Active/Inactive)
SDRAM2 (Active/Inactive)
SDRAM1 (Active/Inactive)
SDRAM0 (Active/Inactive)
48/24 MHz (Active/Inactive)
48/24 MHz (Active/Inactive)
(Reserved) drive to ‘0’
Not Used, drive 0
CPUCLK3 (Active/Inactive)
CPUCLK2 (Active/Inactive)
CPUCLK1 (Active/Inactive)
CPUCLK0 (Active/Inactive)
(Reserved) drive to ‘0’
(Reserved) drive to ‘0’
(Reserved) drive to ‘0’
IOAPIC (Active/Inactive)
(Reserved) drive to ‘0’
(Reserved) drive to ‘0’
REF1 (Active/Inactive)
REF0 (Active/Inactive)
Description
Description
Description
DD
+ 0.5
Byte 2: PCI Active/Inactive
Register (1 = Active, 0 = Inactive), Default = Active
Byte 4: SDRAM Active/Inactive
Register (1 = Active, 0 = Inactive), Default = Active
Byte 6: Reserved, for future use
Junction Temperature............................................... +150 C
Package Power Dissipation.............................................. 1W
Static Discharge Voltage............................................ >2000V
(per MIL-STD-883, Method 3015, like V
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
--
8
16
14
13
12
11
9
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Pin #
Pin #
(Reserved) drive to ‘0’
PCICLK_F (Active/Inactive)
PCICLK5 (Active/Inactive)
PCICLK4 (Active/Inactive)
PCICLK3 (Active/Inactive)
PCICLK2 (Active/Inactive)
PCICLK1 (Active/Inactive)
PCICLK0 (Active/Inactive)
Not used, drive to ‘0’
Not used, drive to ‘0’
Not used, drive to ‘0’
Not used, drive to ‘0’
Not used, drive to ‘0’
Not used, drive to ‘0’
Not used, drive to ‘0’
Not used, drive to ‘0’
Description
Description
DD
pins tied together)
CY2277A
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