Section 11 Local Bus State Controller (LBSC)
Rev.1.00 Dec. 13, 2005 Page 315 of 1286
REJ09B0158-0100
Section 11 Local Bus State Controller (LBSC)
The local bus state controller (LBSC) divides the external memory space and outputs control
signals corresponding to the specifications of various types of memory and bus interfaces. The
LBSC enables the connection of SRAM or ROM, etc., to this LSI. It also supports the PCMCIA
interface protocol, which is used to implement simplified system design and high-speed data
transfers in a compact system.
11.1 Features
The LBSC has the following features.
•
Controls six areas, areas 0 to 2 and 4 to 6, of an external memory space divided into seven
areas.
Maximum 64 Mbytes for each of areas 0 to 2 and 4 to 6
Bus width of each area can be controlled through register settings (except area 0, which is
controlled by the external pin setting)
Wait-cycle insertion by the
RDY
pin
Wait-cycle insertion can be controlled by a program
Types of memory are specifiable for connection to each area
Output of the control signals of memory to each area
Automatic wait cycle insertion to prevent data bus collisions on consecutive memory
accesses
Insertion of cycles to ensure the setup time and hold time to the write strobe on a write
cycle enables connection to low-speed memory
•
SRAM interface
Wait-cycle insertion can be controlled by a program
Insertion of the wait cycle through the
RDY
pin
Connectable areas : 0 to 2 and 4 to 6
Settable bus widths: 32, 16, and 8 bits
•
Burst ROM interface
Wait-cycle insertion can be controlled by a program
Burst length specified by the register
Connectable areas: 0 to 2 and 4 to 6
Settable bus widths: 32, 16, and 8 bits
Summary of Contents for SH7780 Series
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Page 82: ...Section 1 Overview Rev 1 00 Dec 13 2005 Page 32 of 1286 REJ09B0158 0100 ...
Page 122: ...Section 3 Instruction Set Rev 1 00 Dec 13 2005 Page 72 of 1286 REJ09B0158 0100 ...
Page 146: ...Section 4 Pipelining Rev 1 00 Dec 13 2005 Page 96 of 1286 REJ09B0158 0100 ...
Page 196: ...Section 6 Floating Point Unit FPU Rev 1 00 Dec 13 2005 Page 146 of 1286 REJ09B0158 0100 ...
Page 292: ...Section 9 L Memory Rev 1 00 Dec 13 2005 Page 242 of 1286 REJ09B0158 0100 ...
Page 492: ...Section 12 DDR SDRAM Interface DDRIF Rev 1 00 Dec 13 2005 Page 442 of 1286 REJ09B0158 0100 ...
Page 674: ...Section 15 Clock Pulse Generator CPG Rev 1 00 Dec 13 2005 Page 624 of 1286 REJ09B0158 0100 ...
Page 692: ...Section 16 Watchdog Timer and Reset Rev 1 00 Dec 13 2005 Page 642 of 1286 REJ09B0158 0100 ...
Page 726: ...Section 18 Timer Unit TMU Rev 1 00 Dec 13 2005 Page 676 of 1286 REJ09B0158 0100 ...
Page 1032: ...Section 25 Audio Codec Interface HAC Rev 1 00 Dec 13 2005 Page 982 of 1286 REJ09B0158 0100 ...
Page 1150: ...Section 28 General Purpose I O GPIO Rev 1 00 Dec 13 2005 Page 1100 of 1286 REJ09B0158 0100 ...
Page 1184: ...Section 29 User Break Controller UBC Rev 1 00 Dec 13 2005 Page 1134 of 1286 REJ09B0158 0100 ...
Page 1266: ...Section 31 Electrical Characteristics Rev 1 00 Dec 13 2005 Page 1216 of 1286 REJ09B0158 0100 ...
Page 1328: ...Appendix Rev 1 00 Dec 13 2005 Page 1278 of 1286 REJ09B0158 0100 ...
Page 1336: ...Rev 1 00 Dec 13 2005 Page 1286 of 1286 REJ09B0158 0100 ...
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