參數(shù)資料
型號: ISP1183
廠商: NXP Semiconductors N.V.
英文描述: Low-power Universal Serial Bus interface device with DMA
中文描述: 低功耗通用串行總線與DMA接口設(shè)備
文件頁數(shù): 40/62頁
文件大?。?/td> 295K
代理商: ISP1183
Philips Semiconductors
ISP1183
Low-power USB interface device with DMA
Product data
Rev. 01 — 24 February 2004
40 of 62
9397 750 11804
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
After waking up from the suspend state, the firmware must unlock the registers and
FIFOs using this command, by writing the unlock code (AA37H) into the Lock register
(8-bit bus: lower byte first). The bit allocation of the Lock register is given in
Table 39
.
Code (hex): B0 —
unlock the device
Transaction —
write 2 bytes (unlock code)
13.4.3
Frame Number register (R: B4H)
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 41
.
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 39:
Bit
Symbol
Reset
Access
Bit
Symbol
Reset
Access
Lock register: bit allocation
15
14
13
12
11
10
9
8
UNLOCKH[7:0] = AAH
0
W
4
UNLOCKL[7:0] = 37H
1
W
1
W
7
0
W
6
1
W
5
1
W
3
0
W
2
1
W
1
0
W
0
0
W
0
W
1
W
0
W
1
W
1
W
1
W
Table 40:
Bit
15 to 0
Lock register: bit description
Symbol
UNLOCK[15:0]
Description
Sending data AA37H unlocks the internal registers and FIFOs
for writing, following a resume.
Table 41:
Bit
Symbol
Reset
[1]
Access
Bit
Symbol
Reset
[1]
Access
Frame Number register: bit allocation
15
14
13
12
11
10
9
8
reserved
0
R
5
SOFRH[2:0]
0
R
1
0
R
7
0
R
6
0
R
4
0
R
3
0
R
2
0
R
0
SOFRL[7:0]
0
R
0
R
0
R
0
R
0
R
0
R
0
R
0
R
相關(guān)PDF資料
PDF描述
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
ISP1362BD Single-chip Universal Serial Bus On-The-Go controller
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