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SH7616 Datasheet(PDF) 306 Page - Renesas Technology Corp

Part # SH7616
Description  32-Bit RISC Microcomputer SuperH™ RISC engine Family/SH7600 Series
PDF  935 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

SH7616 Datasheet(HTML) 306 Page - Renesas Technology Corp

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Section 7 Bus State Controller (BSC)
Rev. 2.00 Mar 09, 2006 page 280 of 906
REJ09B0292-0200
D15
70
D7
16-bit external device (ordinary)
D0
15
0
70
70
70
A24–A0
000000
000001
000002
000003
000000
000002
000000
000002
Data input/output pin
Byte read/write of address 0
Byte read/write of address 1
Byte read/write of address 2
Byte read/write of address 3
Word read/write of address 0
Word read/write of address 2
Longword read/write of address 0
15
0
31
16
15
0
Figure 7.6 16-Bit External Devices and Their Access Units
D7
8-bit external device (ordinary)
70
D0
70
70
70
15
8
70
15
8
70
31
24
23
16
15
8
70
A24–A0
000000
000001
000002
000003
000000
000001
000002
000003
000000
000001
000002
000003
Data input/output pin
Byte read/write of address 0
Byte read/write of address 1
Byte read/write of address 2
Byte read/write of address 3
Word read/write of address 0
Word read/write of address 2
Longword read/write of address 0
Figure 7.7 8-Bit External Devices and Their Access Units
7.3.2
Connection to Little-Endian Devices
The chip provides a conversion function in CS2, CS4 space for connection to and to maintain data
compatibility with devices that use little-endian format (in which the LSB is the 0 position in the
byte data lineup). When the endian specification bit of BCR1 is set to 1, CS2, CS4 space is little-
endian. The relationship between device data width and access unit for little-endian format is
shown in figures 7.8, 7.9, and 7.10. When sharing memory or the like with a little-endian bus
master, the SH7616 connects D31–D24 to the least significant byte (LSB) of the other bus master
and D7–D0 to the most significant byte (MSB), when the bus width is 32 bits. When the width is



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