7721 datasheet(406/577 Pages) RENESAS

406 / 577 page

APPLICATION

7721 Group User’s Manual

16–3

16.1 Memory connection

Table 16.1.1 Memory connection model

BYTE

M37721

BYTE

M37721

BYTE

M37721

A0–A15

D0–D7

A0–A15

D0–D15

A0–A15+n

D0–D7

16+n

Latch

A0–A15+n

D0–D15

16+n

A0–A7

ALE

BHE

M37721

ALE

BHE

8-bit width;

BYTE = “H”

Notes 1: Refer to “CHAPTER 3. CONNECTION WITH EXTERNAL DEVICES” for details about the functions and

operations of used pins when connecting a memory. Refer to section “Appendix 11. Electrical characteristics”

for timing requirements.

2: Because the address bus can be expanded up to 24 bits when connecting a memory, strengthen the

M37721’s Vss and Vcc lines on the system. (Refer to section “Appendix 8. Countermeasure against noise.”)

External data

bus width

16-bit width;

BYTE = “L”

Access space

Maximum 64 Kbytes

Maximum 16 Mbytes

Memory connection model

Minimum model

Latch

Memory connection model

Medium model B

Memory connection model

Medium model A

Latch

Memory connection model

Maximum model

A8–A15

A16/D0–A23/D7

A0–A7

A8–A15

A16/D0–A23/D7

A0–A7

A8/D8–A15/D15

A16/D0–A23/D7

BLE

A0–A7

A8/D8–A15/D15

A16/D0–A23/D7

BLE

7721 Datasheet(PDF) 406 Page - Renesas Technology Corp

7721 Datasheet(HTML) 406 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL