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CL-GD6420 Datasheet(PDF) 22 Page - Cirrus Logic

Part # CL-GD6420
Description  High-Resolution LCD VGA Controller for Notebook Computers
PDF  146 Pages
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Manufacturer  CIRRUS [Cirrus Logic]
Direct Link  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

CL-GD6420 Datasheet(HTML) 22 Page - Cirrus Logic

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CL-GD6420
Notebook VGA Controller
22
July 1993
DATA BOOK
4.2
CL-GD6420 Extension Register Table (cont.)
Abbr.
Extension Register
Bits
Read/
Reg/
Port
Write
Index
Addr.
–
Reserved
–
–
93-94
3CF
DELTA
CRT Circular Buffer Delta and Burst
[7:0]
R/W
95
3CF
VMCTST
VMC Test Register
[7:0]
R/W
96
3CF
MONSW
Monitor Switch Read-back
[7:4]
R/W
97
3CF
PANCF
Panel Type Configuration Bits
[7:0]
R/W
98
3CF
PUDCF
Pullup/Down Configuration Bits
[7,4,3,0]
R
99
3CF
VMCF
Video Memory Configuration Bits
[7:6, 4:3]
R/W
9A
3CF
MMCF
Misc. Pin Configuration Bits
[6:3, 1:0]
R/W
8B
3CF
MONID
PS/2 Monitor ID Read-back
[7:5]
R/W
9C
3CF
–
Reserved
–
–
9D-9F
3CF
BIUC
BIU Control
[7,4,3,0]
R/W
A0
3CF
TTC
Tristate and Test Control
[7:6, 3:0]
R/W
A1
3CF
BIOSPG
BIOS Page Selection
[2:0]
R/W
A2
3CF
–
Reserved
–
–
A3-A5
3CF
WAIT
Wait State Control
[7, 5:0]
R/W
A6
3CF
GIO
General I/O Register
[7, 3:1]
R/W
A7
3CF
FCER
FC[1:0] Pins Extensions
[3:0]
R/W
A8
3CF
CACHE
BIU Cache Control
[6:0]
R/W
A9
3CF
DREV
Design Revision
[7:0]
R/W
AA
3CF
MREV
Mask Revision
[7:0]
R/W
AB
3CF
–
Reserved
–
–
AC-B9
3CF
SCR5:0
Scratch Registers 5:0
[7:0]
R/W
BA-BF
3CF
ATTC
Attribute Control
[3:0]
R/W
C0
3CF
CURS
Cursor Attributes
[5, 3:0]
R/W
C1
3CF
GRL0:3
Graphics Controller Memory Latches
[7:0]
R/W
C2-C5
3CF
–
Reserved
–
–
C6-C7
3CF
DACPW
DAC Power Control Register
[7:0]
R/W
C8
3CF
GATST
Graphics and Attribute Test Register
[4, 2:0]
R/W
C9
3CF
–
Reserved
–
–
CA-CF
3CF



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