參數(shù)資料
型號: MC68HC08KH12A
廠商: 飛思卡爾半導(dǎo)體(中國)有限公司
英文描述: Microcontrollers
中文描述: 微控制器
文件頁數(shù): 91/178頁
文件大小: 925K
代理商: MC68HC08KH12A
I/O Register Description of the HUB function
MC68HC08KH12A Data Sheet, Rev. 1.1
Freescale Semiconductor
91
PCHG5-PCHG0 — HUB and Port Status Change Bits
These read/write bits report the status change for the Hub, embedded device and the four downstream
ports. The Status Change Bitmap is returned to the host through the HUB endpoint 1 if the bit PNEW
is 1. These bits are cleared by reset.
9.4.9 USB HUB Status Register (HSR)
RSEQ — HUB Endpoint 0 Receive Sequence Bit
This read only bit indicates the type of data packet last received for HUB Endpoint 0 (DATA0 or
DATA1).
1 = DATA1 Token received in last HUB Endpoint 0 Receive
0 = DATA0 Token received in last HUB Endpoint 0 Receive
SETUP — HUB SETUP Token Detect Bit
This read only bit indicates that a valid SETUP token has been received.
1 = Last token received for hub endpoint 0 was a SETUP token
0 = Last token received for hub endpoint 0 was not a SETUP token
Bit Name
Function
Value
Description
PCHG0
HUB status change
0
No status change in HUB
1
HUB status change detected
PCHG1
Port 1 status change
0
No status change in Port 1
1
Port 1 status change detected
PCHG2
Port 2 status change
0
No status change in Port 2
1
Port 2 status change detected
PCHG3
Port 3 status change
0
No status change in Port 3
1
Port 3 status change detected
PCHG4
Port 4 status change
0
No status change in Port 4
1
Port 4 status change detected
PCHG5
Embedded device
status change
0
No status change in embedded
device
1
Embedded device status change
detected
Address: $005D
Bit 7
6
5
4
3
2
1
Bit 0
Read:
RSEQ
SETUP
TX1ST
0
RPSIZ3
RPSIZ2
RPSIZ1
RPSIZ0
Write:
TX1STR
Reset:
X
X
0
0
X
X
X
X
= Unimplemented
X = Indeterminate
Figure 9-12. USB HUB Status Register (HSR)
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