Legacy Bridge—Intel® Quark SoC X1000
Figure 51. 8259 Register Map
PCI Space
CPU
Core
PCI
CAM
(I/O)
PCI
ECAM
(Mem)
Bus 0
SPI0 F:0
SPI1 F:1
I2C*/GPIO F:2
SDIO/eMMC F:0
HSUART0 F:1
USB Device F:2
EHCI Host F:3
OCHI Host F:4
HSUART1 F:5
MAC0 F:6
MAC1 F:7
Host Bridge
D:0,F:0
RP0 F:0
RP0 F:1
Legacy PCI
Header
D:31,F:0
Legacy Bridge
D:31,F:0
Memory
Space
IO Space
Fixed IO
Registers
21.12.3
Note:
I/O Registers
The interrupt controller registers are located at 20h and 21h for the master controller
(IRQ0-7), and at A0h and A1h for the slave controller (IRQ8-13). These registers have
multiple functions, depending upon the data written to them. Table 132 describes the
different register possibilities for each address.
The register descriptions after Table 132 represent one register possibility.
October 2013
Document Number: 329676-001US
Intel® Quark SoC X1000
DS
891