STPCI2(2002) 查看數據表（PDF） - STMicroelectronics
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STPCI2 Datasheet PDF : 111 Pages
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STRAP OPTION
3.2. TYPICAL STRAP OPTION
IMPLEMENTATION
Table Table 3-1.shows the detailed Strap options
required to boot the STPC in ISA mode with a
Host Clock Frequency of 66MHz in X2 mode with
internal keyboard/mouse, UARTS and parallel
port enabled.
Signal
MD1
Designation
Reserved2
Actual
Settings
Pull Up
Description
-
MD2
MD3
HCLK Speed
Pull down
Pull down
HCLK = 66MHz
MD[4]
PCI_CLKO Divisor
Pull up
PCICLK = HCLK/2
MD[5]
MCLK Synchro (see Section 3.1.1. )
Pull down
Asynchronous
MD[6]
MD[7]
PCI_CLKO Programming
Pull up
Pull down
PCICLK PLL Window =
32MHz - 64MHz
MD[8]
MD[9]
MD10
MD11
ISA / PCMCIA / Local Bus
Reserved2
Reserved2
Pull down
Pull down
Pull down
Pull down
ISA Mode
-
-
MD14
MD15
MD16
CPU clock Multiplication
Reserved2
Reserved2
Pull up
Pull up
Pull up
X2 Mode
-
-
MD17
PCI_CLKO Divisor
Pull up
PCICLK = HCLK/2
MD18
HCLK Pad Direction
Pull up
Output
MD19
MCLK Pad Direction
Pull up
Output
MD20
MD21
MD23
DCLK Pad Direction
Reserved2
Reserved2
Pull up
Pull up
Pull up
Output
-
-
MD24
Pull up
MD25
HCLK PLL Speed
Pull up
HCLK = 66MHz
MD26
MD27
MD28
MD29
MD30
MD31
MD32
MD33
MD34
MD35
Reserved2
Reserved2
Reserved2
Reserved2
Reserved2
Reserved2
Reserved2
Reserved2
Reserved2
Pull down
Pull up
-
Pull up
-
Pull up
-
Pull up
-
Pull up
Pull down
Pull up
Pull down
Pull down
MD36
MD37
MD38
Local Bus Boot Device Size
Reserved2
Reserved2
User defined
Pull down
Pull down
Not Applicable
-
-
MD40
CPU clock Multiplication
Pull up
X2 mode
MD41
Reserved2
Pull down
-
MD42
Reserved2
Pull up
-
MD 43
Reserved2
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.
Table 3-1. Typical Strap Option Implementation
40/111
Issue 1.0 - July 24, 2002
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