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H8S/2225 数据表(PDF) 579 Page - Renesas Technology Corp

部件名 H8S/2225
功能描述  16-Bit Single-Chip Microcomputer H8S Family/H8S/2200 Series
PDF  1071 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/2225 数据表(HTML) 579 Page - Renesas Technology Corp

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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
Rev. 5.00 Aug 08, 2006 page 493 of 982
REJ09B0054-0500
14.1.3
Transfer Data (Data Field Contents)
The data filed contents are specified by the control bits.
Table 14.4 Control Bit Contents
Setting
Value
Bit 3*
1
Bit 2
Bit 1
Bit 0
Function*
2
H'0
0
0
0
0
Reads slave status (SSR)
H'1
0
0
0
1
Undefined
 do not use
H'2
0
0
1
0
Undefined
 do not use
H'3
0
0
1
1
Reads data and locks
H'4
0
1
0
0
Reads locked address (lower 8 bits)
H'5
0
1
0
1
Reads locked address (upper 4 bits)
H'6
0
1
1
0
Reads slave status (SSR) and unlocks
H'7
0
1
1
1
Reads data
H'8
1
0
0
0
Undefined
 do not use
H'9
1
0
0
1
Undefined
 do not use
H'A
1
0
1
0
Writes command and locks
H'B
1
0
1
1
Writes data and locks
H'C
1
1
0
0
Undefined
 do not use
H'D
1
1
0
1
Undefined
 do not use
H'E
111
0Writes command
H'F
111
1Writes data
Notes: 1. According to the value of bit 3 (MSB), the transfer directions of the message length bits
in the following message length field and data in the data field vary.
When bit 3 is 1: Data is transferred from the master unit to the slave unit.
When bit 3 is 0: Data is transferred from the slave unit to the master unit.
2. H'3, H'6, H'A, and H'B are control bits to specify lock setting and cancellation.
When the undefined values of H'1, H'2, H'8, H'9, H'C, and H'D are transmitted, the
acknowledge bit is not returned.
When the control bits received from another unit which locked are not included in table 14.5, the
slave unit which has been locked by the master unit rejects acceptance of the control bits and does
not return the acknowledge bit.



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