STPCI2 データシートの表示（PDF） - STMicroelectronics
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STPCI2 Datasheet PDF : 108 Pages
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STPC® ATLAS
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
MD1
Designation
Reserved2
Location
Not accessible
Actual
Settings
Pull Up
Set to ’0’ Set to ’1’
-
-
MD2
MD3
HCLK Speed
Index 5F,bit 6 User defined
Index 5F,bit 7 User defined
See Section 3.1.3
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]
MD[7]
PCI_CLKO Programming
Index 4A,bit 6 User defined
Index 4A,bit 7 Pull-down
See Section 3.1.1.
MD[8]
Index 4A,bit 3 User defined
ISA / PCMCIA / Local Bus
See Section 3.1.1.
MD[9]
MD10
) MD11
t(s MD12
c MD13
u MD14
rod MD15
MD16
P MD17
te MD18
le MD19
o MD20
s MD21
b MD23
O MD24
) - MD25
t(s MD26
MD27
uc MD28
d MD29
ro MD30
P MD31
te MD32
MD33
le MD34
soMD35
b MD36
O MD37
Reserved2
Reserved2
Reserved2
Reserved2
CPU clock Multiplication
Reserved2
Reserved2
PCI_CLKO Divisor
HCLK Pad Direction
MCLK Pad Direction
DCLK Pad Direction
Reserved2
Reserved2
HCLK PLL Speed
Reserved2
Reserved2
Reserved2
Reserved2
Reserved2
Reserved2
Reserved2
Reserved2
Reserved2
Local Bus Boot Device Size
Reserved2
Index 4A,bit 3
Index 4B,bit 2
Index 4B,bit 3
Index 4B,bit 4
Index 4B,bit 5
Index 4B,bit 6
Not accessible
Not accessible
Index 4A,bit 0
Index 4C,bit 2
Index 4C,bit 3
Index 4C,bit 4
Index 5F,bit 0
Index 5F,bit 2
Index 5F,bit 3
Index 5F,bit 4
Index 5F,bit 5
Not accessible
Not accessible
Not accessible
Not accessible
Not accessible
Not accessible
Not accessible
Not accessible
Not accessible
Index 4B,bit 0
Not accessible
User defined
Pull down
Pull down
Pull up
Pull up
Pull-up
Pull up
Pull up
User defined
Pull-up
Pull-up
User defined
Pull up
Pull up
User defined
User defined
User defined
Pull up
Pull up
Pull up
Pull up
Pull up
Pull up
Pull up
Pull up
Pull up
User defined
Pull down
-
-
-
-
-
-
-
-
See Section 3.1.2
-
-
-
-
See Section 3.1.1.
Input
Output
Hi-Z
Output
Input
Output
-
-
-
-
See Section 3.1.3
-
-
-
-
-
-
-
-
8-bit
16-bit
-
-
MD38
Reserved2
Not accessible Pull down
-
-
MD40
CPU clock Multiplication
Index 4B,bit 7 User defined See Section 3.1.2
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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