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参数资料
| 型号： | STPCC0175BTI3 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 32-BIT, 75 MHz, MICROPROCESSOR, PBGA388 |
| 封装： | PLASTIC, BGA-388 |
| 文件页数： | 17/47页 |
| 文件大小： | 747K |
| 代理商： | STPCC0175BTI3 |
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PIN DESCRIPTION
24/47
Issue 1.6
being sent to the interrupt controller, so
that it may be connected directly to the
IRQ pin of the RTC.
PCI_INT[3:0]
PCI Interrupt Request.
These are the PCI bus interrupt signals.
They
are
to
be
encoded
before
connection to the STPC Client using
ISACLK and ISACLKX2 as the input
selection strobes.
DREQ_MUX[1:0]
ISA Bus Multiplexed
DMA Request. These are the ISA bus
DMA request signals. They are to be
encoded before connection to the STPC
Client using ISACLK and ISACLKX2 as
the input selection strobes.
DACK_ENC[2:0]
DMA
Acknowledge.
These
are
the
ISA
bus
DMA
acknowledge signals. They are encoded
by the STPC Client before output and
should be decoded externally using
ISACLK and ISACLKX2 as the control
strobes.
TC
ISA Terminal Count. This is the
terminal
count
output
of
the
DMA
controller and is connected to the TC line
of the ISA bus. It is asserted during the
last DMA transfer, when the Byte count
expires.
3.2.12. MONITOR INTERFACE
RED,
GREEN,
BLUE
RGB
Video
Outputs. These are the 3 analog color
outputs from the RAMDACs
VSYNC
Vertical Synchronization Pulse.
This is the vertical synchronization signal
from the VGA controller.
HSYNC
Horizontal
Synchronization
Pulse.
This
is
the
horizontal
synchronization signal from the VGA
controller.
VREF_DAC
DAC Voltage reference. An
external voltage reference is connected
to this pin to bias the DAC.
RSET
Resistor
Current
Set.
This
reference current input to the RAMDAC
is used to set the full-scale output of the
RAMDAC.
COMP
Compensation.
This
is
the
RAMDAC compensation pin. Normally,
an external capacitor (typically 10nF) is
connected between this pin and VDD to
damp oscillations.
DDC[1:0]
Direct Data Channel Serial
Link.
These
bidirectional
pins
are
connected to CRTC register 3Fh to
implement
DDC
capabilities.
They
conform to I
2C electrical specifications,
they have open-collector output drivers
which are internally connected to VDD
through pull-up resistors.
They can instead be used for accessing
I C devices on board. DDC1 and DDC0
correspond
to
SCL
and
SDA
respectively.
3.2.13. MISCELLANEOUS
ST[6],
Reserved.
ST[5] This is used for speaker output.
ST[4]
Reserved.
ST[3:0] The pins are for testing the
STPC. The default settings on these pins
should be 1111 for the STPC to function
correctly. By setting the ST[3:0] to 0111,
the STPC is tristated.
CLKDEL[2:0]
Reserved. The pins are
reserved for Test and Miscellaneous
functions)
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