Section 14 Direct Memory Access Controller (DMAC)
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REJ09B0158-0100
not cleared in the procedure 4, then the transfer is stopped according to the condition of both
the HE and the TE bits are set to 1.
As explained above, a repeat mode transfer enables sequential voice compression by changing
buffer for storing data received consequentially and a data buffer for processing signals
alternately.
14.4.6
Reload Mode Transfer
In a reload mode transfer, according to the settings of bits RPT[2:0] in CHCR, the value set in
SARB/DARB is set to SAR/DAR and the value of bits TCRB[23:16] is set in bits TCRB[7:0] at
each transfer set in the bits TCRB[7:0], and the transfer is repeated until TCR becomes 0 without
specifying the transfer settings again. A reload mode transfer is effective when repeating data
transfer with specific area. Figure 14.12 shows the operation of reload mode transfer.
DMAC
Bits RPT[2:0]
SHwy bus
CHCR
TCR
TCRB
SAR/DAR
SARB/DARB
Reload controller
Reload signal
Reload counter
Transfer counter
Transfer request
Figure 14.12 Reload Mode Transfer
When a reload mode transfer is executed, TCRB is used as a reload counter. Set TCRB according
to section 14.3.6, DMA Transfer Count Registers B0 to B3, B6 to B9 (TCRB0 to TCRB3, TCRB6
to TCRB9).
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 ...
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