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STPCI2GDY Datasheet(PDF) 33 Page - STMicroelectronics

Part No. STPCI2GDY
Description  X86 Core PC Compatible System-on-Chip for Terminals
Download  111 Pages
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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STPCI2GDY Datasheet(HTML) 33 Page - STMicroelectronics

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STRAP OPTION
Issue 1.0 - July 24, 2002
33/111
3. STRAP OPTION
This chapter defines the STPC Atlas Strap
Options and their locations. Some strap options
are left programmable for future versions of
silicon. The strap options are sampled at a specific
point of the boot process. This is shown in detail in
Figure 4-3
Signal
Designation
Location
Actual
Settings
Set to ’0’
Set to ’1’
MD1
Reserved2
Not accessible
Pull Up
-
-
MD2
HCLK Speed
Index 5F,bit 6
User defined
See Section 3.1.3.
MD3
Index 5F,bit 7
User defined
MD[4]
PCI_CLKO Divisor
Index 4A,bit 1
Pull-up
See Section 3.1.1.
MD[5]
MCLK Synchro (see Section 3.1.1. )
Index 4A,bit 2
User defined
Async
Sync
MD[6]
PCI_CLKO Programming
Index 4A,bit 6
User defined
See Section 3.1.1.
MD[7]
Index 4A,bit 7
Pull-down
MD[8]
ISA / PCMCIA / Local Bus
Index 4A,bit 3
User defined
See Section 3.1.1.
MD[9]
Index 4A,bit 3
User defined
MD10
Reserved2
Index 4B,bit 2
Pull down
-
-
MD11
Reserved2
Index 4B,bit 3
Pull down
-
-
MD14
CPU clock Multiplication
Index 4B,bit 6
Pull-up
See Section 3.1.2.
MD15
Reserved2
Not accessible
Pull up
-
-
MD16
Reserved2
Not accessible
Pull up
-
-
MD17
PCI_CLKO Divisor
Index 4A,bit 0
User defined
See Section 3.1.1.
MD18
HCLK Pad Direction
Index 4C,bit 2
Pull-up
Input
Output
MD19
MCLK Pad Direction
Index 4C,bit 3
Pull-up
Hi-Z
Output
MD20
DCLK Pad Direction
Index 4C,bit 4
User defined
Input
Output
MD21
Reserved2
Index 5F,bit 0
Pull up
-
-
MD23
Reserved2
Index 5F,bit 2
Pull up
-
-
MD24
HCLK PLL Speed
Index 5F,bit 3
User defined
See Section 3.1.3.
MD25
Index 5F,bit 4
User defined
MD26
Index 5F,bit 5
User defined
MD27
Reserved2
Not accessible
Pull up
-
-
MD28
Reserved2
Not accessible
Pull up
-
-
MD29
Reserved2
Not accessible
Pull up
-
-
MD30
Reserved2
Not accessible
Pull up
-
-
MD31
Reserved2
Not accessible
Pull up
MD32
Reserved2
Not accessible
Pull down
MD33
Reserved2
Not accessible
Pull up
MD34
Reserved2
Not accessible
Pull down
MD35
Reserved2
Not accessible
Pull down
MD36
Local Bus Boot Device Size
Index 4B,bit 0
User defined
8-bit
16-bit
MD37
Reserved2
Not accessible
Pull down
-
-
MD38
Reserved2
Not accessible
Pull down
-
-
MD40
CPU clock Multiplication
Index 4B,bit 7
User defined
See Section 3.1.2.
MD41
Reserved2
Not accessible
Pull down
-
-
MD42
Reserved2
Not accessible
Pull up
-
-
MD 43
Reserved2
Not accessible
Pull down
-
-
Note1: Strap options on TC/PA[3] and DACK_ENC[2:0]/PA[2:0] are required for all the STPC Atlas Configurations (ISA,
PCMCIA, Local Bus).
Note2: Must be implemented.


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