參數(shù)資料
型號： STPCI2EEYC
廠商： STMICROELECTRONICS
元件分類： 外設(shè)及接口
英文描述： MULTIFUNCTION PERIPHERAL, PBGA516
封裝： PLASTIC, BGA-516
文件頁數(shù)： 4/80頁
文件大?。?/td> 854K
代理商： STPCI2EEYC
STRAP OPTION
Issue 0.4 - July 16, 2001
12/80
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
2. 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 inSection 4.5.1
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 2.1.3.
MD3
Index 5F,bit 7
User defined
MD4
PCI_CLKO Divisor
Index 4A,bit 1
Pull-up
See Section 2.1.1.
MD5
MCLK Synchro (see Section 2.1.1. )
Index 4A,bit 2
User defined
Async
Sync
MD6
PCI_CLKO Programming
Index 4A,bit 6
User defined
See Section 2.1.1.
MD7
Index 4A,bit 7
Pull-down
MD8
ISA / PCMCIA / Local Bus
Index 4A,bit 3
User defined
See Section 2.1.1.
MD9
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 2.1.2.
MD15
Reserved2
Not accessible
Pull up
-
MD16
Reserved2
Not accessible
Pull up
-
MD17
PCI_CLKO Divisor
Index 4A,bit 0
User defined
See Section 2.1.1.
MD18
HCLK Pad Direction
Index 4C,bit 2
Pull-up
Input
Output
MD19
MCLK Pad Direction
Index 4C,bit 3
Pull-up
Input
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 2.1.3.
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
Reserved
2
Not accessible
Pull up
-
MD30
Reserved2
Not accessible
Pull up
-
MD 36
Local Bus Boot Device Size
4B,bit 0
User defined
8-bit
16-bit
MD 37
Reserved
2
Not accessible
Pull up
-
MD 38
Reserved2
Not accessible
Pull up
-
MD 39
Reserved2
Not accessible
Pull up
-
MD 40
CPU clock Multiplication
Index 4B,bit 7
User defined
See Section 2.1.2.
MD 41
Reserved2
Not accessible
Pull down
-
MD 42
Reserved2
Not accessible
Pull up
-
MD 43
Reserved2
Not accessible
Pull down
-
MD 45
Reserved2
Not accessible
Pull down
-
MD 46
Reserved2
Not accessible
Pull up
-
MD 47
Reserved2
Not accessible
Pull down
-
MD 48
Reserved2
Not accessible
Pull up
-
Note
1: 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).
Note
2: Must be implemented.
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