r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 715
r8a77850anbg
Manufacturer Part Number
r8a77850anbg
Description
Renesas 32-bit Risc Microcomputer Superh? Risc Engine Family
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.R8A77850ANBG.pdf
(1692 pages)
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Bit
17
16
Bit Name
AM
AL
Initial
Value
0
0
R/W
R/W
R/W
Descriptions
Acknowledge Mode
Selects whether DACK is output in a data read cycle or
in a data write cycle. DACK is output only for LBSC
space transfers.
This bit is valid in only CHCR0 to CHCR3.
0: DACK output in a read cycle
1: DACK output in a write cycle
Acknowledge Level
Specifies whether the DACK signal output is high-active
or low-active. This bit is valid in only CHCR0 to CHCR3.
If DACK active direction has been changed, reflecting
the change on the external pins requires two cycles of
the external bus clock after writing to register is
completed.
0: DACK output low-active
1: DACK output high-active
(DACK is output only when the DMA transfer
(DACK is output only when the DMA transfer source
is LBSC space.)
destination is LBSC space.)
14. Direct Memory Access Controller (DMAC)
Rev.1.00 Jan. 10, 2008 Page 685 of 1658
REJ09B0261-0100
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