RTL8181 ETC, RTL8181 Datasheet - Page 13

• Manufacturer Part Number: RTL8181
• Description: Wireless LAN Access Point/Gateway Controller
• Manufacturer: ETC

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Memory map (without TLB):
The memory map of RTL8181 I/O devices and registers are located in KSEG1 segment (uncacheable region). The following
table illustrates the address map:
Virtual address range
0xBD01_0000 – 0xBD01_0FFF 4K
0xBD01_1000 – 0xBD01_1FFF 4K
0xBD20_0000 – 0xBD2F_FFFF 1M
0xBD30_0000 – 0xBD3F_FFFF 1M
0xBD40_0000 – 0xBD4F_FFFF 1M
0xBD50_0000 – 0xBD5F_FFFF 1M
0xBD60_0000 – 0xBD6F_FFFF 1M
0xBD70_0000 – 0xBD77_FFFF 512K
0xBD78_0000 – 0xBD7F_FFFF 512K
NOTE: The special function includes interrupt control, timer, watchdog, UART, and GPIO.
4. Register Mapping
The following table displays the address mapping of the all registers:
Virtual Address
Interrupt Controller
0xBD01_0000
0xBD01_0004
GPIO
0xBD01_0040
0xBD01_0044
0xBD01_0048
0xBD01_004C
Timer
0xBD01_0050
CONFIDENTIAL
Virtual Address
0x8000_0000
0x81ff_ffff
0xa000_0000
0xa1f f_ffff
0xbfc0_0000
0xbfff_ffff
Register Symbol
GIMR
GISR
PABDIR
PABDATA
PBIMR
PBISR
TCCNT
Cacheable
region
None
cacheable
region
None
cacheable
region
Size (bytes) Mapped device
Register Name
Global mask register
Global interrupt status register
Port A/B direction register
Port A/B data register
Port B interrupt mask register
Port B interrupt register
Timer/Counter control register
Special function registers (note)
Memory controller registers
Ethernet0
Ethernet1
WLAN controller
IO map address of PCI device
Memory map address of PCI device
Configuration space of PCI device0
Configuration space of PCI device1
SDRAM
(32Mbyte)
Flash
(4Mbyte)
13
Physical Address
0x0000_0000
0x01ff_ffff
0x1fc0_0000
0x1fff_ffff
RTL8181
v1.0