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参数资料
| 型号： | IBM37RGB524CF17A |
| 元件分类： | 显示控制器 |
| 英文描述： | 1600 X 1280 PIXELS PALETTE-DAC DSPL CTLR, PQFP144 |
| 封装： | QFP-144 |
| 文件页数： | 49/72页 |
| 文件大小： | 509K |
| 代理商： | IBM37RGB524CF17A |
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March 17, 1995
47
IBM
RGB524
10.2.7
Diagnostic Support
Revision Level
Index:
0x0000
Access:
Read Only
Power on Value: Revision Level
Bits 7 - 0
Product Revision Level
The value in this register indicates the revision level of
the product.
ID
Index:
0x0001
Access:
Read Only
Power on Value: 0x02
Bits 7 - 0
Product Identication Code
This register distinguishes among the various members
of the IBM Microelectronics Palette DAC family. The
value of 0x02 indicates that this product is one of sev-
eral that have two clock generators.
DAC Sense
Index:
0x0082
Access:
Read Only
Power on Value: Undened
Bit 7
LSNS - Latched Sense
Bit 6
LBLU COMP - Latched Blue DAC
Comparator Output
Bit 5
LGRN COMP - Latched Green DAC
Comparator Output
Bit 4
LRED COMP - Latched Red DAC
Comparator Output
Bit 3
SENS - Sense
Bit 2
BLU COMP - Blue DAC Comparator
Output
Bit 1
GRN COMP - Green DAC Compara-
tor Output
Bit 0
RED COMP - Red DAC Comparator
Output
Bits 2,1,0 are the outputs of the three DAC reference
comparators. The DAC output voltages are compared
against the 0.35 V internal reference voltage (presented
on COMPVREF). These bits are the “raw” outputs of the
comparators.
Bits 6,5,4 are latched copies of bits 2,1,0. The latches are
clocked during active line time (when BLANK [and
BORDER, when a border is used] are both high).
Bit 3 (Sense) represents the combined status of bits
2,1,0. If any of these bits is 0, bit 3 will be 0.
Bit 7 (Latched Sense) represents the combined status of
bits 6,5,4. If any of these bits is 0, bit 7 will be 0.
Either bit 3 or bit 7 will be presented on the SENSE out-
put, depending on the SENS SEL bit of the Miscella-
neous Control 1 register.
If the selected bit is 0, SENSE will be low.
If the selected bit is 1, SENSE will be high.
0
1
2
3
4
5
6
7
Revision Level
0
1
2
3
4
5
6
7
ID
0
1
2
3
4
5
6
7
LGRN
LBLU
LSNS
COMP COMPCOMP
COMPCOMP COMP
LRED SENS
RED
GRN
BLUE
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