Datasheet

Section 6 Bus Controller (BSC)
R01UH0309EJ0500 Rev. 5.00 Page 169 of 1408
Sep 24, 2012
H8S/2456, H8S/2456R, H8S/2454 Group
6.3.6 Area 0 Burst ROM Interface Control Register (BROMCRH)
Area 1 Burst ROM Interface Control Register (BROMCRL)
BROMCRH and BROMCRL are used to make burst ROM interface settings. Area 0 and area 1
burst ROM interface settings can be made independently in BROMCRH and BROMCRL,
respectively.
Bit Bit Name Initial Value R/W Description
7 BSRMn 0 R/W Burst ROM Interface Select
Selects the basic bus interface or burst ROM
interface.
0: Basic bus interface space
1: Burst ROM interface space
6
5
4
BSTSn2
BSTSn1
BSTSn0
0
0
0
R/W
R/W
R/W
Burst Cycle Select
These bits select the number of burst cycle states.
000: 1 state
001: 2 states
010: 3 states
011: 4 states
100: 5 states
101: 6 states
110: 7 states
111: 8 states
3
2
⎯
⎯
0
0
R/W
R/W
Reserved
These bits are always read as 0. The initial value
should not be changed.
1
0
BSWDn1
BSWDn0
0
0
R/W
R/W
Burst Word Number Select
These bits select the number of words that can be
burst-accessed on the burst ROM interface.
00: Maximum 4 words
01: Maximum 8 words
10: Maximum 16 words
11: Maximum 32 words
(n = 1 or 0)