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H8S/2218 数据表(PDF) 168 Page - Renesas Technology Corp

部件名 H8S/2218
功能描述  16-Bit Single-Chip Microcomputer H8S Family/H8S/2200 Series
PDF  750 Pages
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制造商  RENESAS [Renesas Technology Corp]
网页  http://www.renesas.com
标志 RENESAS - Renesas Technology Corp

H8S/2218 数据表(HTML) 168 Page - Renesas Technology Corp

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Section 6 Bus Controller
Rev.6.00 Jun. 03, 2008 Page 120 of 698
REJ09B0074-0600
6.3.3
Wait Control Registers H and L (WCRH, WCRL)
WCRH and WCRL select the number of program wait states for each area.
Program waits are not inserted in the case of on-chip memory or internal I/O registers except for
the on-chip USB.
•
WCRH
Bit
Bit Name
Initial Value R/W
Description
7
6
W71*
W70*
1
1
R/W
R/W
Area 7 Wait Control 1 and 0
These bits select the number of program wait states
when area 7 in external space is accessed while the
AST7 bit in ASTCR is set to 1.
00: Program wait not inserted when external space area
7 is accessed
01: 1 program wait state inserted when external space
area 7 is accessed
10: 2 program wait states inserted when external space
area 7 is accessed
11: 3 program wait states inserted when external space
area 7 is accessed
5
4
W61*
W60*
1
1
R/W
R/W
Area 6 Wait Control 1 and 0
These bits select the number of program wait states
when area 6 in external space is accessed while the
AST6 bit in ASTCR is set to 1.
00: Program wait not inserted when external space area
6 is accessed
01: 1 program wait state inserted when external space
area 6 is accessed
10: 2 program wait states inserted when external space
area 6 is accessed
11: 3 program wait states inserted when external space
area 6 is accessed
Note: * The on-chip USB and on-chip RTC are allocated to area 6 and area 7, respectively.
Therefore, these bits should be set to 0.



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