Section 14 Direct Memory Access Controller (DMAC)
Rev.1.00 Dec. 13, 2005 Page 575 of 1286
REJ09B0158-0100
Bit Bit
Name
Initial
Value R/W Descriptions
19 HE 0 R/(W)
*
Half End Flag
After HIE (bit 18) is set to 1 and the number of transfers
become half of TCR (1 bit shift to right) which is set
before transfer starts, HE becomes 1.
This bit is set to 1 when the TCR value is equal to any
of the following:
•
(TCR set before transfer)/2 (TCR: even number)
•
(TCR set before transfer - 1)/2 (TCR: odd number)
•
8,388,608 (H'0080 0000) (TCR: maximum number
H'0000 0000)
The HE bit is not set when transfers are ended by an
NMI interrupt or address error, or by clearing the DE bit
or the DME bit in DMAOR before the number of
transfers is decreased to half of the TCR value set
preceding the transfer. The HE bit is kept set when the
transfer ends by an NMI interrupt or address error, or
clearing the DE bit (bit 0) or the DME bit in DMAOR
after the HE bit is set to 1. To clear the HE bit, write 0
after reading 1 in the HE bit. This bit is valid only in
CHCR0 to CHCR3 and CHCR6 to CHCR9.
0: During the DMA transfer or DMA transfer has been
interrupted
TCR
>
(TCR set before transfer)/2
[Clearing condition]
Writing 0 after HE = 1 is read.
1: TCR = (TCR set before transfer)/2
Содержание SH7780 Series
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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 ...
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