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PC87415VCG Datasheet(PDF) 11 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # PC87415VCG
Description  PCI-IDE DMA Master Mode Interface Controller
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

PC87415VCG Datasheet(HTML) 11 Page - National Semiconductor (TI)

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50 Configuration Registers (Continued)
Reg
RW
Description
(HEX)
40 – 42
RW
CONTROL REGISTER (CTRL)
Default value is 00000000h (after Reset)
Bit 0 Reserved
Bit 1 0 (Always) Reserved
Bit 2 0 e Software reset to CH1CH2 off
1 e Software reset to CH1CH2 on
Bit 3 0 e IDE
PWR set on
1 e IDE
PWR set off
Note
Bit 18 must be set to ‘‘1’’ to allow Bit 3 to toggle IDE
PWR
B18
B3
IDE
PWR
0
X
1 (Default at power up reset)
1
0
1 (IDE
PWR set to on)
1
1
0 (IDE
PWR set to off)
( ) Asserted for t
25 s
Bit 4 0 e Map CH1
INT according to legacynative mapping scheme
1 e Map CH1
INT to INTA regardless if in legacy mode
Bit 5 0 e Map CH2
INT according to legacynative mapping scheme
1 e Map CH2
INT to INTA regardless if in legacy mode
Bit 6 0 e INTA
unmasked
1 e INTA
masked
Bit 7 0 e Write to vendor ID and device ID registers disabled
1 e Write to vendor ID and device ID registers enabled
Bit 8 0 e Channel 1 interrupt unmasked
1 e Channel 1 interrupt masked
Bit 9 0 e Channel 2 interrupt unmasked
1 e Channel 2 interrupt masked
Bit 10 0 e PCI Base Address Register 2 and 3 enabled
1 e PCI Base Address Register 2 and 3 disabled
Bit 11 0 e PCI data phase WATCHDOGTM timer disabled
1 e PCI data phase WATCHDOG timer enabled
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