W90221X Winbond Electronics Corp America, W90221X Datasheet - Page 81

• Manufacturer Part Number: W90221X
• Description: Pa-risc Embedded Controller
• Manufacturer: Winbond Electronics Corp America

VA Scaling Control Register (VASC)
Port address: 0x0000013c
Bit 0
Bits 1-2
Bits 3-15
Bit 16
Bits 17-18
Bits 19-31
W90221X version 0.6
HUPS
VUPS
16
24
0
8
0
1
0
1
17
25
1
9
Reserved
Reserved
VA vertical up-scaling method
Replication
Interpolation
Reserved
VA vertical scaling factor
This 13-bit value specifies the vertical scaling factor of 0.5 (1/2 down-
scaling), and 1.0 ~ 7.999 (up-scaling). Bits 0-2 specify the integral
part and bits 3-12 specify the decimal part of the scaling factor. The
1/2 downing-scaling will be done when this value < 1 (bits 0-2 = 000
and bits 3-12 don’ t care). Scaling is disabled when this value = 1.000
(bits 0-2 = 001 and bits 3-12 = 000H).
VA horizontal up-scaling method
Replication
Interpolation
Reserved
VA horizontal scaling factor
This 13-bit value specifies the horizontal scaling factor of 0.5 (1/2
down-scaling), and 1.0 ~ 7.999 (up-scaling). Bits 0-2 specify the
integral part and bits 3-12 specify the decimal part of the scaling
factor. The 1/2 downing-scaling will be done when this value < 1 (bits
0-2 = 000 and bits 3-12 don’ t care). Scaling is disabled when this
value = 1.000 (bits 0-2 = 001 and bits 3-12 = 000H).
10
18
26
2
VA Horizontal Scaling Factor [5:12]
VA Vertical Scaling Factor [5:12]
Access type: read/write
11
19
27
3
VA Horizontal Scaling Factor [0:4]
VA Vertical Scaling Factor [0:4]
12
20
28
4
13
21
29
5
14
22
30
6
Default: 0x---
15
23
31
7
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