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5 . 3
Interface Control Registers
The interface control registers comprise eight 16-bit registers related to overall Q2 control, mapped
onto addresses (A10–A1) H'000 to H'007.
5 . 3 . 1
System Control Register (SYSR)
15
SRES
1
R/W
14
DRES
1
R/W
13
DEN
0
R/W
12
—
—
—
11
—
—
—
8
RS
0
R/W
10
—
—
—
9
DC
0
R/W
Bit:
Initial value:
Read/Write:
Note: * Value is retained.
7
DBM1
*
R/W
6
DBM0
*
R/W
5
DMA1
0
R/W
4
DMA0
0
R/W
3
—
*
R/W
0
—
*
R/W
2
—
*
R/W
1
—
*
R/W
The system control register (SYSR) is a 16-bit readable/writable register that specifies Q2 system
operation.
SYSR is initialized as follows in a reset:
•
Bits SRES and DRES are set to 1.
•
Bits DEN, RS, DMA1, and DMA0 are cleared to 0.
•
Bits DBM1 and DBM0 retain their values.
Bit 15—Software Reset (SRES): Controls execution and suspension of command
processing,
Bit 15:
S R E S
Description
0
Command processing execution is enabled.
1
SRES is set to 1 when a hardware reset is performed. Clear SRES to 0 in initialization.
Set SRES to 1 with software.
(Initial value)
Bit 14—Display Reset (DRES)
Summary of Contents for HD64411 Q2
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Page 108: ...101 Example 0 0 Work coordinates Rendering coordinates XC YC ...
Page 110: ...103 Example Old XC YC Old XC XC old YC YC 0 0 Work coordinates Rendering coordinates XC YC ...
Page 116: ...109 Example 0 0 Work coordinates Rendering coordinates XMIN YMIN XMAX YMAX ...
Page 118: ...111 Example 0 0 Work coordinates Rendering coordinates XMAX YMAX ...
Page 120: ...113 Example 0 0 Work coordinates XMIN YMIN XMAX YMAX ...
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