參數(shù)資料
型號: UPD70F3134AGJ-UEN
廠商: NEC Corp.
英文描述: 32-Bit Single-Chip Microcontrollers
中文描述: 32位單芯片微控制器
文件頁數(shù): 36/99頁
文件大?。?/td> 528K
代理商: UPD70F3134AGJ-UEN
CHAPTER 3 SPECIFICATIONS OF PCI HOST BRIDGE MACRO
Application Note U17121EJ1V1AN
36
3.4.2 PCI_CONFIG_ADD register
After reset: 00000000H R/W Offset address: 04H
31
0
CADD
Bit Name
R/W
Function
CADD
R/W
Sets PCI configuration register address of access target.
(1) How to set PCI_CONFIG_ADD register
(a) Type 0 (PCI device)
31
11 10
8
7
2
1
0
0
0
IDSEL specification
Function
number
Register number
IDSEL specification: Selects the IDSEL signal corresponding to the access target PCI device.
Because this PCI host bridge macro uses the AD31 to AD11 signals as the IDSEL
signal for each PCI device, the AD signal connected to the IDSEL pin of each PCI
device is specified in this field. For example, if the AD31 signal is connected to the
IDSEL pin of a PCI device, access is enabled by setting bit 31 of CADD to 1.
Function number:
Specifies the function number for a multifunction device.
Register number:
Specifies the number of the access target PCI configuration register.
(b) Type 1 (PCI-PCI bridge)
31
24 23
16 15
11 10
8
7
2
1
0
0
1
Bus number
Device number
Function
number
Register number
Bus number:
Device number:
Function number:
Register number:
Specifies the number of the PCI bus connected to the access target PCI device.
Specifies the device number of the access target PCI device.
Specifies the function number for a multifunction device.
Specifies the number of the access target PCI configuration register.
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