Ameba-D User Manual
User Manual All information provided in this document is subject to legal disclaimers. © REALTEK 2019. All rights reserved.
448
0: Low level for command address
1: High level for command parameter
0
CSPL
R/W
0
The CS pulse polarity.
0: Low level for active pulse
1: High level for active pulse
20.3.4.2
LCDC_MCU_VSYNC_CFG
Name
: LCDC MCU vertical synchronization register
Size:
32 bits
Address offset:
0x0064
Read/write access:
read/write
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
MCUVSPD
R/W (SHW)
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
MCUVSPD
RSVD
MCUVSW
R/W (SHW)
R/W (SHW)
Bit
Name
Access
Reset
Description
31:12
MCUVSPD
R/W (SHW)
0
MCUIFMODE = 1: VSYNC idle period. This value equals to VSYNC period –
IMAGEWIDTH * IMAGEHEIGHT * WR_pulse_per_pixel-5. Unit: WR pulse width.
MCUIFMODE = 0: The buffer time between frames. This value equals to the
time of a frame’s end to the next start -5. Unit: WR pulse width.
MCUIFMODE = 2: Invalid usage.
The maximum value is 1048571.
11:8
RSVD
N/A
0
Reserved
7:0
MCUVSW
R/W (SHW)
0
VSYNC signal width - 1. Unit: WR pulse width. (only for MCU VSYNC mode)
20.3.4.3
LCDC_MCU_TIMING_CFG
Name
: LCDC MCU timing register
Size:
32 bits
Address offset:
0x0068
Read/write access:
read/write
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
RDINACTW
RDACTW
R/W (SHW)
R/W (SHW)
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
RDACTW
WRPULW
R/W (SHW)
R/W (SHW)
Bit
Name
Access
Reset Description
31:21
RDINACTW
R/W (SHW)
0
RD inactive pulse width -1. Unit: system clock
20:10
RDACTW
R/W (SHW)
0
RD active pulse width -1. Unit: system clock
9:0
WRPULW
R/W (SHW)
2
Write clock divider depends on this value. The relationship between them is as
follows:
0: The write clock divider is 2
2: The write clock divider is 4
4: The write clock divider is 6
6: The write clock divider is 8
...
The frequency of write clock is derived from the following equation:
Write clock = SYS_CLK/( 2)
where WRPULW is any even value between 0 and 1022.
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2019-05-15 10:08:03