HD6417320 RENESAS [Renesas Technology Corp], HD6417320 Datasheet - Page 958
HD6417320
Manufacturer Part Number
HD6417320
Description
Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6417320.pdf
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Section 26
26.3.22 LCDC Memory Access Interval Number Register (LDLIRNR)
LDLIRNR controls the bus cycle interval when the LCDC reads VRAM. When LDLIRNR is set
to other than H′00, the LCDC does not access VRAM until the specified number of bus cycles
(accessing the external memory or on-chip registers) has been performed by the
CPU/DMAC/USBH. When LDLIRNR is set to H'00 (initial value), the LCDC accesses the
VRAM, the CPU/DMAC/USBH performs one bus cycle, and then the LCDC accessed VRAM.
Rev. 3.00 Jan. 18, 2008 Page 896 of 1458
REJ09B0033-0300
Bit
15 to 8
7 to 0
Bus cycle
CKIO
Bit Name
LIRN7 to
LIRN0
LCD Controller (LCDC)
LCDC1 LCDC2
(When displaying routated image,
4/8/16/32 can be selected.)
16 bursts
LCDC3
Initial Value
All 0
All 0
...
LCDC16
R/W
R
R/W
The number of bus cycles other than LCDC is set to
CPU
LIRN7 to LIRN0. (1 to 255 bus cycles)
Description
Reserved
These bits are always read as 0. The write value
should always be 0.
VRAM Read Bus Cycle Interval
Specifies the number of the CPU/DMAC/USBH
bus cycles which can be performed during burst
bus cycles to read VRAM by LCDC.
H'00: one bus cycle
H'01: one bus cycle
H'FF: 255 bus cycles
CPU
:
...
CPU
LCDC1
...
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