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STPCINDUSTRIAL Folha de dados(PDF) 12 Page - STMicroelectronics

Nome de Peças STPCINDUSTRIAL
Descrição Electrónicos  PC Compatible Embedded Microprocessor
PDF  55 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STPCINDUSTRIAL Folha de dados(HTML) 12 Page - STMicroelectronics

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STRAP OPTION
12/55
Issue 1.1
2.1 STRAP OPTION REGISTER DESCRIPTION
2.1.1 STRAP REGISTER 0 INDEX 4AH (STRAP0)
Bits 7-0, This register reflect the status of pins MD[7:0] respectively. They are expected to be connected
on the system board to the SIMM configuration pins as follows:
Note that the SIMM speed and type information read here is meant only for the software and is not used
by the hardware. The software must program the Host and graphics DRAM controller configuration regis-
ters appropriately based on these bits.
This register defaults to the values sampled on MD[7:0] pins after reset.
MD 39
Reserved
Pull up
MD 40
PCMCIA or PCI i/f
3C,bit 0
User defined
PCI
PCMCIA
MD 41
Local Bus or ISA i/f
3C,bit 1
User defined
ISA
Local Bus
MD 42
Key Board & Mouse
3C,bit 2
User defined
External
Internal
MD 43
Parallel Port
3C,bit 3
User defined
External
Internal
MD 44
Serial Port
UART1
3C,bit 4
User defined
External
Internal
MD 45
UART2
3C,bit 5
User defined
External
Internal
MD 46
Reserved
3C,bit 6
Pull down
MD 47
Reserved
3C,bit 7
Pull down
MD 48
TFT
Outputs on RFU pads
3D,bit 0
User defined
Disable
Enable
MD 49
Cardbus Socket
5V Availability
3D,bit 1
User defined
Not Availa-
ble
Available
MD 50
3.3V Availability
3D,bit 2
User defined
Not Availa-
ble
Available
MD 51
x.xV Available
3D,bit 3
User defined
Not Availa-
ble
Available
MD 52
y.yV Available
3D,bit 4
User defined
Not Availa-
ble
Available
MD 53
Reserved
Pull uo
MD 56
Reserved
Pull up
MD 57
Reserved
Pull down
MD 58
Reserved
Pull up
MD 59
Reserved
Pull down
Bit Sampled
Description
Bit 7
SIMM 0 DRAM type
Bits 6-5
SIMM 0 speed
Bit 4
SIMM 1 DRAM type
Bits 3-2
SIMM 1 speed
Bits 1-0
Reserved
Memory
Data
Lines
Refer to
Designation
Location
Actual
Settings
Set to ’0’
Set to ’1’



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