CY7C67300-100AXA datasheet(7/102 Pages) CYPRESS

Part #	CY7C67300-100AXA

Description	EZ-Host Programmable Embedded USB Host and Peripheral Controller

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Manufacturer	CYPRESS [Cypress Semiconductor]

Direct Link	http://www.cypress.com

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CY7C67300

Document #: 38-08015 Rev. *K

Page 7 of 102

External Memory Interface Pins

External Memory Interface Block Diagrams

Figure 2 illustrates how to connect a 64k × 8 memory array

(SRAM/ROM) to the EZ-Host external memory interface.

Figure 3 illustrates the interface for connecting a 16-bit ROM or

16-bit RAM to the EZ-Host external memory interface. In 16-bit

mode, up to 256K words of external ROM or RAM are supported.

Note that the address lines do not map directly.

Table 6. External Memory Interface Pins

Pin Name

Pin Number

nWR

64

nRD

62

nXMEMSEL (optional nCS)

34

nXROMSEL (ROM nCS)

35

nXRAMSEL (RAM nCS)

36

A18

95

A17

96

A16

97

A15

38

A14

33

A13

32

A12

31

A11

30

A10

27

A9

25

A8

24

A7

20

A6

17

A5

8

A4

7

A3

3

A2

2

A1

1

nBEL/A0

99

nBEH

98

D15

67

D14

68

D13

69

D12

70

D11

71

D10

72

D9

73

D8

74

D7

76

D6

77

D5

78

D4

79

D3

80

D2

81

D1

82

D0

83

Figure 2. Interfacing to 64k × 8 Memory Array

Figure 3. Interfacing up to 256k × 16 for External Code/Data

Table 6. External Memory Interface Pins (continued)

Pin Name

Pin Number

EZ-Host

CY7C67300

External Memory Array

64K x 8

A[15:0]

nWR

nRD

nXRAMSEL

A[15:0]

WE

OE

CE

D[7:0]

Interfacing to 64K x 8 External Memory Array

EZ-Host

CY7C67300

External Memory Array

Up to 256k x 16

A[18:1]

nBEL

nBEH

nWR

nRD

nXMEMSEL

A[17:0]

BLE

WE

OE

CE

D[15:0]

Up to 256k x 16 External Code/Data (Page Mode)

BHE

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