參數(shù)資料
型號: ISP1181DGG
廠商: NXP SEMICONDUCTORS
元件分類: 總線控制器
英文描述: INDUCTOR 4.7NH +-.3NH 0402 SMD
中文描述: UNIVERSAL SERIAL BUS CONTROLLER, PDSO48
封裝: 6.10 MM, PLASTIC, TSSOP-48
文件頁數(shù): 38/69頁
文件大?。?/td> 1655K
代理商: ISP1181DGG
Philips Semiconductors
ISP1181
Full-speed USB interface
Objective specification
Rev. 01 — 13 March 2000
38 of 69
9397 750 06896
Philips Electronics N.V. 2000. All rights reserved.
12.3.3
Write/Read Scratch Register
This command accesses the 16-bit Scratch Register, which can be used by the
firmware to save and restore information, e.g. the device status before powering
down in ‘suspend’ state. The register bit allocation is given in
Table 42
.
Code (Hex): B2/B3 —
write/read Scratch Register
Transaction —
write/read 2 bytes
12.3.4
Read Frame Number
This command returns the frame number of the last successfully received SOF. It is
followed by reading one or two bytes from the Frame Number Register, containing the
frame number (lower byte first). The Frame Number Register is shown in
Table 44
.
Remark:
After a bus reset, the value of the Frame Number Register is undefined.
Code (Hex): B4 —
read frame number
Transaction —
read 1 or 2 bytes
[1]
Reset value undefined after a bus reset.
Table 42: Scratch Information Register: bit allocation
Bit
15
Symbol
Reset
0
Access
R/W
Bit
7
Symbol
Reset
0
Access
R/W
14
13
12
11
10
9
8
SFIRH[7:0]
0
0
0
0
0
0
0
R/W
6
R/W
5
R/W
4
R/W
3
R/W
2
R/W
1
R/W
0
SFIRL[7:0]
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Table 43: Scratch Information Register: bit description
Bit
Symbol
Description
15 to 8
SFIRH[7:0]
Scratch Information Register (high byte)
7 to 0
SFIRL[7:0]
Scratch Information Register (low byte)
Table 44: Frame Number Register: bit allocation
Bit
15
Symbol
reserved
Reset
[1]
0
Access
R
Bit
7
Symbol
Reset
[1]
0
Access
R
14
13
12
11
10
9
8
reserved
0
R
6
reserved
0
R
5
reserved
0
R
4
reserved
0
R
3
SOFRH[2:0]
0
R
1
0
R
2
0
R
0
SOFRL[7:0]
0
R
0
R
0
R
0
R
0
R
0
R
0
R
相關(guān)PDF資料
PDF描述
ISP1183 Low-power Universal Serial Bus interface device with DMA
ISP1183BS Low-power Universal Serial Bus interface device with DMA
ISP1301 Universal Serial Bus On-The-Go transceiver
ISP1301BS Universal Serial Bus On-The-Go transceiver
ISP1362 Single-chip Universal Serial Bus On-The-Go controller
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