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STPC4HEBI Datasheet(PDF) 27 Page - STMicroelectronics

Part No. STPC4HEBI
Description  X86 Core PC Compatible Information Appliance System-on-Chip
Download  93 Pages
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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STPC4HEBI Datasheet(HTML) 27 Page - STMicroelectronics

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STRAP OPTIONS
Release 1.5 - January 29, 2002
27/93
3. STRAP OPTIONS
This chapter defines the STPC Consumer-II Strap
Options and their location. Some strap options are
left programmable for future versions of silicon. .
Table 3-1. Strap Options
Signal
Designation
Actual Settings1
Set to ’0’
Set to ’1’
MD1
Reserved
Pull up
-
-
MD2
HCLK PLL Speed
User defined
see Section 3.1.4. bit 6
MD3
User defined
see Section 3.1.4. bit 7
MD4
PCICLKO Division
User defined
see Section 3.1.3. bit 1
MD5
MCLK/HCLK Sync (see Section 3.1.1.)
User defined
Async
Sync
MD6
PCICLKO frequency
User defined
see Section 3.1.1. bit 6
MD7
Reserved
Pull down
-
-
MD10
Reserved
Pull down
-
-
MD11
Reserved
Pull down
-
-
MD14
Reserved
Pull up
-
-
MD16
Reserved
Pull up
-
-
MD17
PCI_CLKO Divisor
User defined
see Section 3.1.3. bit 1
MD18
Reserved
Pull-up
-
-
MD19
Reserved
Pull-up
-
-
MD20
DCLK Pad Direction
User defined
Input
Output
MD21
Reserved
Pull up
-
-
MD22
Reserved
Pull up
-
-
MD23
Reserved
Pull up
-
-
MD24
HCLK PLL Speed
User defined
see Section 3.1.4. bit 3
MD25
User defined
see Section 3.1.4. bit 4
MD26
User defined
see Section 3.1.4. bit 5
MD27
Reserved
Pull down
-
-
MD28
Reserved
Pull down
-
-
MD29
Reserved
Pull down
-
-
MD30
Reserved
Pull down
-
-
MD40
CPU Mode (see Section 3.1.3.)
User defined
X1
X2
MD41
Reserved
Pull down
-
-
MD42
Reserved
Pull up
-
-
MD43
Reserved
Pull down
-
-
MD44
Bus select (see Section 3.1.1.)
User defined
ISA
Local Bus
MD45
Reserved
Pull down
-
-
MD46
Reserved
Pull up
-
-
MD47
Reserved
Pull down
-
-
MD48
Reserved
Pull up
-
-
TC
Reserved
Pull up
-
-
DACK_ENC[2:0]
Reserved
Pull up
-
-
Note1: Where a strap is represented by a ’Pull up’ or ’Pull down’, these have to be adhered to. If it is represented as a ’-
’ it can be left unconnected. Where ’User defined’, the strap is set by the user.


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