SC2200 datasheet(235/433 Pages) NSC

235 / 433 page

Revision 3.0

235

www.national.com

Core Logic Module (Continued)

5.4.1.2

LPC Support Registers

F0 Index 14h, Base Address Register 1 (F0BAR1) points to

the base address of the register space that contains the

configuration registers for LPC support. Table 5-31 gives

the bit formats of the I/O mapped registers accessed

through F0BAR1.

The LPC Interface supports all features described in the

LPC bus specification 1.0, with the following exceptions:

• Only 8- or 16-bit DMA, depending on channel number.

Does not support the optional larger transfer sizes.

• Only one external DRQ pin.

Table 5-31. F0BAR1+I/O Offset: LPC Interface Configuration Registers

Bit

Description

Offset 00h-03h

SERIRQ_SRC — Serial IRQ Source Register (R/W)

Reset Value: 00000000h

31:21

Reserved.

INTD Source. Selects the interface source of the INTD# signal.

0: PCI - INTD#. (Program PMR[24] = 1 to enable INTD# function on ball.)

1: LPC - SERIRQ. (Program PMR[14] = 1 and PMR[22] = 1 or LPC_ROM strap = 1 to enable SERIRQ function on ball.)

INTC Source. Selects the interface source of the INTC# signal.

0: PCI - INTC#. (Program PMR[4] =1 and PMR[9] = 0 to enable INTD# function on ball.

1: LPC - SERIRQ. (Program PMR[14] = 1 and PMR[22] = 1 or LPC_ROM strap = 1 to enable SERIRQ function on ball.)

INTB Source. Selects the interface source of the INTB# signal.

0: PCI - INTB#.

1: LPC - SERIRQ. (Program PMR[14] = 1 and PMR[22] = 1 or LPC_ROM strap = 1 to enable SERIRQ function on ball.)

INTA Source. Selects the interface source of the INTA# signal.

0: PCI - INTA#.

1: LPC - SERIRQ. (Program PMR[14] = 1 and PMR[22] = 1 or LPC_ROM strap = 1 to enable SERIRQ function on ball.)

Reserved. Set to 0.

IRQ15 Source. Selects the interface source of the IRQ15 signal.

0: ISA - IRQ15. (Program PMR[18] = 0 and PMR[8] = 1 to enable IRQ15 function on ball.)

1: LPC - SERIRQ. (Program PMR[14] = 1 and PMR[22] = 1 or LPC_ROM strap = 1 to enable SERIRQ function on ball.)

IRQ14 Source. Selects the interface source of the IRQ14 signal.

0: ISA - IRQ14. (Program PMR[24] = 0 to enable IRQ14 function on ball.)

1: LPC - SERIRQ. (Program PMR[14] = 1 and PMR[22] = 1 or LPC_ROM strap = 1 to enable SERIRQ function on ball.)

IRQ13 Source. Selects the interface source of the internal IRQ13 signal.

0: ISA - IRQ13. (Internal signal - An input from the CPU indicating that a floating point error has been detected and that

internal INTR should be asserted.)

1: LPC - SERIRQ. (Program PMR[14] = 1 and PMR[22] = 1 or LPC_ROM strap = 1 to enable SERIRQ function on ball.)

IRQ12 Source. Selects the interface source of the IRQ12 signal.

0: ISA - IRQ12. (Unavailable externally.)

1: LPC - SERIRQ (Program PMR[14] = 1 and PMR[22] = 1 or LPC_ROM strap = 1 to enable SERIRQ function on ball.)

IRQ11 Source. Selects the interface source of the IRQ11 signal.

0: ISA - IRQ11 (Unavailable externally.)

1: LPC - SERIRQ (Program PMR[14] = 1 and PMR[22] = 1 or LPC_ROM strap = 1 to enable SERIRQ function on ball.)

IRQ10 Source. Selects the interface source of the IRQ10 signal.

0: ISA - IRQ10. (Unavailable externally.)

1: LPC - SERIRQ. (Program PMR[14] = 1 and PMR[22] = 1 or LPC_ROM strap = 1 to enable SERIRQ function on ball.)

IRQ9 Source. Selects the interface source of the IRQ9 signal.

0: ISA - IRQ9. (Program PMR[24] = 1.)

1: LPC - SERIRQ. (Program PMR[14] = 1 and PMR[22] = 1 or LPC_ROM strap = 1 to enable SERIRQ function on ball.)

IRQ8# Source. Selects the interface source of the IRQ8# signal.

0: ISA - IRQ8# (Internal signal - Connected to internal RTC.)

1: LPC - SERIRQ (Program PMR[14] = 1 and PMR[22] = 1 or LPC_ROM strap = 1 to enable SERIRQ function on ball.)

IRQ7 Source. Selects the interface source of the IRQ7 signal.

0: ISA - IRQ7. (Unavailable externally.)

1: LPC - SERIRQ. (Program PMR[14] = 1 and PMR[22] = 1 or LPC_ROM strap = 1 to enable SERIRQ function on ball.)

SC2200 Datasheet(PDF) 235 Page - National Semiconductor (TI)

SC2200 Datasheet(HTML) 235 Page - National Semiconductor (TI)

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL