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NUC970 Technical Reference Manual
Publication Release Date: Dec. 15, 2015
- 1052 -
Revision V1.30
NUC97
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CHNIC
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JPEG Engine Mode Control Register (JMCR)
Register
Offset
R/W
Description
Reset Value
JMCR
J 0x000 R/W
JPEG Engine Mode Control Register
0x0000_0000
31
30
29
28
27
26
25
24
Reserved
23
22
21
20
19
18
17
16
Reserved
15
14
13
12
11
10
9
8
Reserved
RESUMEI
RESUMEO
7
6
5
4
3
2
1
0
ENC_DEC
WIN_DEC
PRI
THB
EY422
QT_BUSY
ENG_RST
JPG_EN
Bits
Description
[31:10]
Reserved
Reserved.
[9]
RESUMEI
Resume JPEG Operation for Input On-the-fly Mode
Write a “1” to this bit to restart JPEG from a pending state after an input wait interrupt event
occurs. This bit will be automatically set to “0” after JPEG receives it.
Note:
This bit can be set when the next source data is filled into frame buffer by host no
matter JPEG is pending or not.
[8]
RESUMEO
Resume JPEG Operation for Output On-the-fly Mode
Write a “1” to this bit to restart JPEG from a pending state after an output wait interrupt event
occurs. This bit will be automatically set to “0” after JPEG receives it.
Note:
This bit can be set when the JPEG generated data is fetched from frame buffer by host
no matter JPEG is pending or not.
[7]
ENC_DEC
JPEG Encode/Decode Mode
0 = Decode.
1 = Encode.
[6]
WIN_DEC
JPEG Window Decode Mode
0 = Disable, decode full image.
1 = Enable, only the window region defined by registers
JWINDEC
of the whole image will be
decoded.
Note:
This bit is only valid when JPEG engine is operates in decode mode. If window decode
mode is enabled, the up-scaling and down-scaling functions are not allowed.
[5]
PRI
Encode Primary Image
0 = Disable encoding primary image.
1 = Enable encoding primary image.
[4]
THB
Encode Thumbnail Image
0 = Disable encoding thumbnail image.
1 = Enable encoding thumbnail image.