Section 1 Overview
Rev.1.00 Dec. 13, 2005 Page 31 of 1286
REJ09B0158-0100
1.7
SuperHyway Memory (SuperHyway RAM)
The SH7780 includes an on-chip SuperHyway memory which stores instructions or data. The
SuperHyway memory has the following features.
•
Capacity
Total SuperHyway memory capacity is 32 Kbytes (512 words
×
256 bits
×
2 pages).
•
Memory address map
The SuperHyway memory is allocated within the physical address H'FE41 0000 to H'FE41
3FFF and H'FE42 0000 to H'FE42 3FFF.
•
Ports
Each page has one common read and write port, and is connected to the SuperHyway bus via a
4-stage buffer respectively. High-speed access to the SuperHyway memory is enabled by the
SuperHyway bus master.
•
Access
The SuperHyway memory is always accessed by the SuperHyway bus master module,
including the CPU, via the SuperHyway bus which is a physical address bus.
1-/2-/4-/8-/16-/32-byte access is possible for both reading and writing
(with wraparound on 32-byte boundary data).
A 32-byte cache fill can be read out with one access
(an 8-byte
×
4 transfer on the SuperHyway bus).
Note that the read/write operation on the SuperHyway bus is done with one clock. After that
the bus is released.
•
Minimum access time
1-/2-/4-/8-byte read access: 14 clock cycles; 1-/2-/4-/8-byte write access: 12 clock cycles
16-/32-byte read access: 17 clock cycles; 16-/32-byte write access: 15 clock cycles
(The SuperHyway clock
≤
200 MHz)
•
Usage note
A SuperHyway bus master module, such as DMAC, can access the SuperHyway memory in
sleep mode.
Содержание SH7780 Series
Страница 2: ...Rev 1 00 Dec 13 2005 Page ii of l ...
Страница 28: ...Rev 1 00 Dec 13 2005 Page xxviii of l ...
Страница 50: ...Rev 1 00 Dec 13 2005 Page l of l ...
Страница 82: ...Section 1 Overview Rev 1 00 Dec 13 2005 Page 32 of 1286 REJ09B0158 0100 ...
Страница 122: ...Section 3 Instruction Set Rev 1 00 Dec 13 2005 Page 72 of 1286 REJ09B0158 0100 ...
Страница 146: ...Section 4 Pipelining Rev 1 00 Dec 13 2005 Page 96 of 1286 REJ09B0158 0100 ...
Страница 196: ...Section 6 Floating Point Unit FPU Rev 1 00 Dec 13 2005 Page 146 of 1286 REJ09B0158 0100 ...
Страница 292: ...Section 9 L Memory Rev 1 00 Dec 13 2005 Page 242 of 1286 REJ09B0158 0100 ...
Страница 450: ...Section 11 Local Bus State Controller LBSC Rev 1 00 Dec 13 2005 Page 400 of 1286 REJ09B0158 0100 ...
Страница 492: ...Section 12 DDR SDRAM Interface DDRIF Rev 1 00 Dec 13 2005 Page 442 of 1286 REJ09B0158 0100 ...
Страница 674: ...Section 15 Clock Pulse Generator CPG Rev 1 00 Dec 13 2005 Page 624 of 1286 REJ09B0158 0100 ...
Страница 692: ...Section 16 Watchdog Timer and Reset Rev 1 00 Dec 13 2005 Page 642 of 1286 REJ09B0158 0100 ...
Страница 726: ...Section 18 Timer Unit TMU Rev 1 00 Dec 13 2005 Page 676 of 1286 REJ09B0158 0100 ...
Страница 1004: ...Section 24 Multimedia Card Interface MMCIF Rev 1 00 Dec 13 2005 Page 954 of 1286 REJ09B0158 0100 ...
Страница 1032: ...Section 25 Audio Codec Interface HAC Rev 1 00 Dec 13 2005 Page 982 of 1286 REJ09B0158 0100 ...
Страница 1070: ...Section 26 Serial Sound Interface SSI Module Rev 1 00 Dec 13 2005 Page 1020 of 1286 REJ09B0158 0100 ...
Страница 1104: ...Section 27 NAND Flash Memory Controller FLCTL Rev 1 00 Dec 13 2005 Page 1054 of 1286 REJ09B0158 0100 ...
Страница 1150: ...Section 28 General Purpose I O GPIO Rev 1 00 Dec 13 2005 Page 1100 of 1286 REJ09B0158 0100 ...
Страница 1184: ...Section 29 User Break Controller UBC Rev 1 00 Dec 13 2005 Page 1134 of 1286 REJ09B0158 0100 ...
Страница 1266: ...Section 31 Electrical Characteristics Rev 1 00 Dec 13 2005 Page 1216 of 1286 REJ09B0158 0100 ...
Страница 1328: ...Appendix Rev 1 00 Dec 13 2005 Page 1278 of 1286 REJ09B0158 0100 ...
Страница 1336: ...Rev 1 00 Dec 13 2005 Page 1286 of 1286 REJ09B0158 0100 ...
Страница 1339: ......
Страница 1340: ...SH7780 Hardware Manual ...