参数资料
型号: M66291GP
元件分类: 总线控制器
英文描述: UNIVERSAL SERIAL BUS CONTROLLER, PQFP48
封装: 7 X 7 MM, 0.50 MM PITCH, PLASTIC, LQFP-48
文件页数: 128/128页
文件大小: 928K
代理商: M66291GP
M66291GP/HP
Rev 1.01 2004.11.01 page 97 of 122
3.5 Enumeration
Figure 3.13 shows the overview of enumeration operations.
Host side
procedure
H/W procedure
S/W side
procedure
USBbus connect
(PC power O N etc.)
FullSpeed
device recognition
Vbus interrupt
FullSpeed
device notification
(Set the T r_O N bits)
Initialize procedure
Powered state
(DVSQ ="000")
USB bus reset
Device state
transition interrupt
(USB bus reset)
USB reset procedure
G ET _DESC RIPT O R
request (AD DR=0)
Control transfer
stage transition
interrupt
Descriptor
data set
Descriptor receive
SET _ADD RESS
request
C ontrol transfer
stage transition interrupt
(at disabled autom atic
response)
G ET _DESC RIPT O R
request (ADD R0)
Control transfer
stage transition
interrupt
Descriptor
data set
Descriptor receive
SET _C ON FIGU RAT IO N
request
Configuration receive
Default state
(DVSQ ="001")
Address state
(DVSQ ="010")
Device state
transition interrupt
(SetAddress)
SetAddress procedure
C ontrol transfer
stage transition interrupt
(at disabled autom atic
response)
Device state
transition interrupt
(SetConfiguration)
Configured
state
(DVSQ ="011")
Figure 3.13 Overview of Bus
Enumeration Operations
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