HD6432351 datasheet(166/1025 Pages) RENESAS

166 / 1025 page

Section 6 Bus Controller

Rev. 3.00 Sep 15, 2006 page 132 of 988

REJ09B0330-0300

6.2.4

Bus Control Register H (BCRH)

ICIS1

R/W

ICIS0

R/W

BRSTRM

R/W

BRSTS1

R/W

BRSTS0

R/W

RMTS0

R/W

RMTS2

R/W

RMTS1

R/W

Bit

Initial value

R/W

BCRH is an 8-bit readable/writable register that selects enabling or disabling of idle cycle

insertion, and the memory interface for areas 2 to 5 and area 0.

BCRH is initialized to H'D0 by a power-on reset and in hardware standby mode. It is not

initialized by a manual reset or in software standby mode.

Bit 7—Idle Cycle Insert 1 (ICIS1): Selects whether or not one idle cycle state is to be inserted

between bus cycles when successive external read cycles are performed in different areas.

Bit 7

ICIS1

Description

Idle cycle not inserted in case of successive external read cycles in different areas

Idle cycle inserted in case of successive external read cycles in different areas

(Initial value)

Bit 6—Idle Cycle Insert 0 (ICIS0): Selects whether or not one idle cycle state is to be inserted

between bus cycles when successive external read and external write cycles are performed.

Bit 6

ICIS0

Description

Idle cycle not inserted in case of successive external read and external write cycles

Idle cycle inserted in case of successive external read and external write cycles

(Initial value)

Bit 5—Burst ROM Enable (BRSTRM): Selects whether area 0 is used as a burst ROM

interface. In normal mode, the selection can be made from the entire external space.

Bit 5

BRSTRM

Description

Area 0 is basic bus interface

(Initial value)

Area 0 is burst ROM interface

HD6432351 датащи(PDF) 166 Page - Renesas Technology Corp

HD6432351 датащи(HTML) 166 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

датащи скачать

ссылки URL