參數(shù)資料
型號: TP6508
英文描述: Pushbutton Switch; Actuator Diameter:0.078"; Circuitry:6PDT; Switch Operation:6 Changeover Push-Push; Contact Current Max:100mA; Leaded Process Compatible:Yes; Mounting Type:PCB; Switch Function:6PDT
中文描述: 顯卡
文件頁數(shù): 22/134頁
文件大小: 600K
代理商: TP6508
P18
Symble Type Drive Pin Number Active Function
-
-
True
True
These three analog outputs are generated by
TP6508's internal build-in DAC and it supplies
current corresponding to the red , green , blue
value of pixel being displayed.
This pin input is used as the internal build-in
RAMDAC voltage reference. A setting resister
is required between this pin and AVSS1 deter-
mines the full-scale output of each DAC.
Vertical retrace synchronization signal drives
the CRT monitor.
Horizontal retrace synchronization signal drives
the CRT monitor.
60
58
57
55
64
65
RED
GREEN
BLUE
Analog Output
Analog Output
Analog Output
20ma
20ma
20ma
RSET
Analog Output
10ma
VSYNC
O
12maR
HSYNC
O
12maR
* CRT Output interface (6 pins)
ROMCS*
O
(I/O)
8maR
TEST
I/O
4maR
29
178
Low
True
VGA BIOS ROM enable signal for ISA bus, it
generated by HM86509 when the 32k-byte
memory location from C0000 to C7fff or the
64k-byte memory domain setting by extended
registers is selected.
This pin is intended for testing. It can be rede-
fined as other useful function pin at the combi-
nation switch type of description in extended reg-
ister Hex CC .
* MISC. Pins (2 pins)
* Clock Input Interface (4 pins)
XTALI
EXMCLK
OSC
I
I
I
-
-
-
XTALO
EXVCLK
O
I
(I/O)
I
(I/O)
-
-
32KHZ
-
203
204
178
154
True
True
True
True
True
True
The pin serves as the crystal input.
External memory clock input.
It requires an input frequency of 14.318MHz
with a duty cycle of 50+/-5%.This input pin sup-
plies the reference frequency for the Dual-fre-
quency Synthesizer .
The pin serves as the crystal output .
External video clock input It is a optional input
from STANBY pin.
Refresh clock input for DRAMs under into OFF
mode (VESA DPMS).
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