SH7708 datasheet(219/633 Pages) RENESAS

219 / 633 page

201

Bit 12: HIZCNT

Description

RAS and CAS signals become high-impedance (High-Z) in standby mode

and in bus-released state.

(Initial value)

RAS and CAS signals drive in standby mode and in bus-released state.

Bit 11—Endian Flag (ENDIAN): Samples the value of the external pin designating endian upon a

power-on reset. Endian for all physical spaces is decided by this bit, which is read-only.

Bit 11: ENDIAN

Description

(On reset) Endian setting external pin (MD5) is low. Indicates the SH7708

Series is set as big-endian.

(On reset) Endian setting external pin (MD5) is high. Indicates the SH7708

Series is set as little-endian.

Bits 10 and 9—Area 0 Burst ROM Control (A0BST1, A0BST0): These bits specify whether to

use burst ROM in physical space area 0. When burst ROM is used, they set the number of burst

transfers.

Bit 10: A0BST1

Bit 9: A0BST0

Description

Access area 0 as normal memory.

(Initial value)

Access area 0 as burst ROM (4 consecutive accesses).

Can be used when bus width is 8, 16, or 32.

Access area 0 as burst ROM (8 consecutive accesses).

Can be used only when bus width is 8 or 16.

Access area 0 as burst ROM (16 consecutive

accesses). Can be used only when bus width is 8.

Bits 8 and 7—Area 5 Burst Enable (A5BST1, A5BST0): These bits specify whether to use burst

ROM and PCMCIA burst mode in physical space area 5. When burst ROM and PCMCIA burst

mode are used, they set the number of burst transfers.

Bit 8: A5BST1

Bit 7: A5BST0

Description

Access area 5 as normal memory.

(Initial value)

Burst access of area 5 (4 consecutive accesses). Can

be used when bus width is 8, 16, or 32.

Burst access of area 5 (8 consecutive accesses). Can

be used only when bus width is 8 or 16.

Burst access of area 5 (16 consecutive accesses). Can

be used only when bus width is 8.

SH7708 Datasheet(PDF) 219 Page - Renesas Technology Corp

SH7708 Datasheet(HTML) 219 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 Descarga

Enlace URL