參數(shù)資料
型號: ISP1301
廠商: NXP Semiconductors N.V.
英文描述: Universal Serial Bus On-The-Go transceiver
中文描述: 通用串行總線在- The - Go的收發(fā)器
文件頁數(shù): 26/46頁
文件大?。?/td> 245K
代理商: ISP1301
Philips Semiconductors
ISP1301
USB OTG transceiver
Product data
Rev. 01 — 14 April 2004
26 of 46
9397 750 11355
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
13. I
2
C-bus protocol
For detailed information, refer to The I
2
C-bus specification; version 2.1
13.1 I
2
C-bus byte transfer format
[1]
S = Start; A = Acknowledge; P = Stop.
13.2 I
2
C-bus device address
13.3 Write format
A write operation can be performed as:
One-byte write to the specified register address
Multi-byte write to N consecutive registers, starting from the specified start
address. N defines the number of registers to write. If N = 1, only the start register
is written.
13.3.1
One-byte write
Figure 12
illustrates the byte sequence.
Table 33:
S
I
2
C-bus byte transfer format
[1]
Byte 1
A
8 bits
Byte 2
8 bits
A
Byte 3
8 bits
A
A
P
Table 34:
Bit
Device address byte 1
7
6
5
4
3
2
1
0
-
device address
A3
1
Name
Value
A6
0
A5
1
A4
0
A2
1
A1
0
A0
X
R/W
X
Table 35:
Bit
7 to 1
Bit description
Symbol Description
A[6:0]
Device address
: The device address of the ISP1301 is: 0101 10 (A0).
The value of A0 (LSB) is loaded from pin ADR/PSW during reset
(including power-on reset). If pin ADR/PSW = HIGH, bit A0 = 1;
otherwise bit A0 = 0.
R/W
Read/write command.
0
0 —
write
1 —
read.
Table 36:
Byte
S
Device select
ACK
Register address K
Transfer format description for one-byte write
Description
master starts with a START condition
master transmits device address and write command bit R/W = 0
slave generates an acknowledgment
master transmits address of register K
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