SC2200 NSC [National Semiconductor], SC2200 Datasheet - Page 275

• Manufacturer Part Number: SC2200
• Description: Thin Client On a Chip
• Manufacturer: NSC [National Semiconductor]

Revision 3.0
Core Logic Module
Offset 1Ch-1Fh
Note:
18:16
2:0
Bit
31
30
29
28
27
26
25
24
23
22
21
20
19
6
5
4
3
Table 5-38. F3BAR0+Memory Offset: XpressAUDIO Configuration Registers (Continued)
Bits 31:16 of this register are Write Only. Reads to these bits always return a value of 0.
Description
Reserved. Must be set to 0.
IRQ5 Internal. Configures IRQ5 for internal (software) or external (hardware) use.
0: External.
1: Internal.
IRQ4 Internal. Configures IRQ4 for internal (software) or external (hardware) use.
0: External.
1: Internal.
IRQ3 Internal. Configures IRQ3 for internal (software) or external (hardware) use.
0: External.
1: Internal.
Reserved. Must be set to 0.
Mask Internal IRQ15. (Write Only)
0: Disable.
1: Enable.
Mask Internal IRQ14. (Write Only)
0: Disable.
1: Enable.
Reserved. (Write Only) Must be set to 0.
Mask Internal IRQ12. (Write Only)
0: Disable.
1: Enable.
Mask Internal IRQ11. (Write Only)
0: Disable.
1: Enable.
Mask Internal IRQ10. (Write Only)
0: Disable.
1: Enable.
Mask Internal IRQ9. (Write Only)
0: Disable.
1: Enable.
Reserved. (Write Only) Must be set to 0.
Mask Internal IRQ7. (Write Only)
0: Disable.
1: Enable.
Reserved. (Write Only) Must be set to 0.
Mask Internal IRQ5. (Write Only)
0: Disable.
1: Enable.
Mask Internal IRQ4. (Write Only)
0: Disable.
1: Enable.
Mask Internal IRQ3. (Write Only)
0: Disable.
1: Enable.
Reserved. (Write Only) Must be set to 0.
(Continued)
Internal IRQ Control Register (R/W)
275
Reset Value: 00000000h
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