參數(shù)資料
型號(hào)： STPCC0390BTC3
廠商： STMICROELECTRONICS
元件分類： 外設(shè)及接口
英文描述： MULTIFUNCTION PERIPHERAL, PBGA388
封裝： PLASTIC, BGA-388
文件頁(yè)數(shù)： 17/59頁(yè)
文件大?。?/td> 932K
代理商： STPCC0390BTC3
STRAP OPTIONS
24/59
Issue 1.1 - October 16, 2000
3.1 Power on strap registers description
3.1.1 Strap register 0 Configuration Index 4Ah
(Strap0)
This register is Reserved.
3.1.2 Strap register 1 Configuration Index 4Bh
(Strap1)
This register is Reserved.
3.1.3 Strap register 2 Configuration Index 4Ch
(Strap2)
Bits 7-5
Reserved.
Bit 4 This bit reflects the value sampled on
MD[20] pin and controls the Dot clock (DCLK)
source as follows:
0: External. DCLK pin is an input.
1: Internal. DCLK pin is an output and
is connected to the internal frequen-
cy synthesizer output.
Note this bit is writeable as well as readable.
Bit 3 This bit reflects the value sampled on
MD[19] pin and controls the Memory clock output
(MCLKO) source as follows:
0: External. MCLKO pin is tristated.
1: Internal. MCLKO pin is an output
and is connected to the internal fre-
quency synthesizer output.
Bit 2 This bit reflects the value sampled on
MD[18] pin and controls the Host/CPU clock
source as follows:
0: External. HCLK pin is an input.
1: Internal. HCLK pin is an output and
is connected to the internal frequen-
cy synthesizer output.
Bit 1 This bit reflects the value sampled on
MD[17] pin and controls the PCI clock output as
follows:
0: PCI clock output = HCLK / 3
1: PCI clock output = HCLK / 2
Bit 0 This bit reflects the value sampled on
MD[16] pin and controls the configuration of
MASTERx and either SD[15:8] (in user mode) or
VIN[7:0] for use in test/debug modes.
0: Configured as test bus.
1: Configured as normal IOs.
This register defaults to the values sampled on
MD[23] & MD[20:16] pins after reset.
MD36
-
Reserved
-
MD37
-
Reserved
-
MD38
-
Reserved
-
MD39
-
Reserved
-
MD40
CPU
CPU Mode
Hardware
User defined
DX1
DX2
MD41
-
Reserved
Hardware
Pull down
-
MD42
-
Reserved
Hardware
Pull up
-
MD43
-
Reserved
Hardware
Pull down
-
MD44
-
Reserved
Hardware
Pull down
-
MD45
-
Reserved
Hardware
Pull up
-
MD46
-
Reserved
Hardware
Pull down
-
MD47
-
Reserved
Hardware
Pull down
-
MD48
-
Reserved
Hardware
Pull up
-
Memory
Data
Lines
Refer to
Designation
Location
Actual
Settings
Set to ’0’
Set to ’1’
Note; Where the indication hardware appears, the strap options are selected directly on the board by jumpers
or resistances. Refer to the reference schematics for examples.
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