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參數(shù)資料
| 型號(hào)： | W83L519D |
| 英文描述： | Peripheral Miscellaneous |
| 中文描述： | 周邊雜項(xiàng) |
| 文件頁數(shù)： | 11/23頁 |
| 文件大小： | 374K |
| 代理商： | W83L519D |
W83L519D
PRELIMINARY
The trademarks and intellectual property rights of Memory Stick belong to SONY Corporation
Publication Release Date: Feb. 2002
The trademarks and intellectual property rights of SD belong to SD GROUP
All trademarks and brand names belong to their respective owners
Revision 0.50
10
5
CONFIGURATION REGISTER
5.1
Plug and Play Configuration
W83L519D implement compatible PNP protocol to access configuration registers for setting up
different types of configurations. There are three Logical Devices (Logical Device 0 to Logical Device
2) in W83L518D/W83L519D which correspond to three major functions: Smart Card Interface (logical
device 0), Memory Stick Interface/SD memory Interface (logical device 1), GPIO (logical device 2).
Each Logical Device has its own configuration registers (CR30 and above). Host can access those
registers by writing an appropriate logical device number into logical device select register at CR7 first.
One set per
logical device
logical device select
07h
30h
3Fhlogical device control
40h
FEh
global registers
logical device
configuration
5.2
Compatible PnP
5.2.1
Extended Function Register
W83L518D/W83L519D provide two methods to enter Extended Function mode (compatible PnP)
and access configuration registers dependent on value of HEFRAS (bit 6 of CR26) as follows:
HEFRAS
0
1
address and value
write 83h to I/O address 2Eh twice
write 83h to I/O address 4Eh twice
In Compatible PnP, a specific value (83h) must be written twice to the Extended Function Enable
Register (EFER at I/O address 2Eh or 4Eh). Secondly, an index value (02h, 07h-FFh) must be
written to the Extended Function Index Register (EFIR, I/O address at 2Eh or 4Eh which is the same
as EFER) to identify which configuration register is to be accessed. User can then access the
addressed configuration register through the Extended Function Data Register (EFDR, I/O address
at 2Fh or 4Fh).
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