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PCA9641PW 数据表(PDF) 55 Page - NXP Semiconductors

部件名 PCA9641PW
功能描述  2-channel I2C-bus master arbiter
PDF  55 Pages
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制造商  NXP [NXP Semiconductors]
网页  http://www.nxp.com
标志 NXP - NXP Semiconductors

PCA9641PW 数据表(HTML) 55 Page - NXP Semiconductors

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NXP Semiconductors
PCA9641
2-channel I2C-bus master arbiter
© NXP Semiconductors N.V. 2015.
All rights reserved.
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: salesaddresses@nxp.com
Date of release: 27 October 2015
Document identifier: PCA9641
Please be aware that important notices concerning this document and the product(s)
described herein, have been included in section ‘Legal information’.
28. Contents
1
General description . . . . . . . . . . . . . . . . . . . . . . 1
2
Features and benefits . . . . . . . . . . . . . . . . . . . . 2
3
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
4
Ordering information . . . . . . . . . . . . . . . . . . . . . 3
4.1
Ordering options . . . . . . . . . . . . . . . . . . . . . . . . 3
5
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 4
6
Pinning information . . . . . . . . . . . . . . . . . . . . . . 5
6.1
Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
6.2
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 5
7
Functional description . . . . . . . . . . . . . . . . . . . 6
7.1
Device address . . . . . . . . . . . . . . . . . . . . . . . . . 6
7.2
Address maps. . . . . . . . . . . . . . . . . . . . . . . . . . 7
7.3
Command Code . . . . . . . . . . . . . . . . . . . . . . . 10
7.4
Power-on reset . . . . . . . . . . . . . . . . . . . . . . . . 11
7.5
Reset input (RESET) . . . . . . . . . . . . . . . . . . . 11
7.6
Software reset. . . . . . . . . . . . . . . . . . . . . . . . . 11
7.7
Voltage translation . . . . . . . . . . . . . . . . . . . . . 12
8
Register descriptions . . . . . . . . . . . . . . . . . . . 13
8.1
Register 0: ID register ([B2:B0] = 000b) . . . . . 13
8.2
Register 1: Control register ([B2:B0] = 001b) . 13
8.3
Register 2: Status register ([B2:B0] = 010b) . . 16
8.4
Register 3: Reserve Time register
([B2:B0] = 011b) . . . . . . . . . . . . . . . . . . . . . . . 18
8.5
Register 4: Interrupt Status register
([B2:B0] = 100b) . . . . . . . . . . . . . . . . . . . . . . . 20
8.6
Register 5: Interrupt Mask register
([B2:B0] = 101b) . . . . . . . . . . . . . . . . . . . . . . . 21
8.7
Registers 6 and 7: MB registers
([B2:B0] = 110b and 111b) . . . . . . . . . . . . . . . 21
8.8
Operating cycle of the downstream bus . . . . . 22
8.8.1
Request the downstream bus . . . . . . . . . . . . . 22
8.8.2
Acquire the downstream bus . . . . . . . . . . . . . 22
8.8.3
Give up the downstream bus . . . . . . . . . . . . . 22
9
Arbitration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
9.1
Rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
9.2
Disconnect events . . . . . . . . . . . . . . . . . . . . . 23
10
State machines. . . . . . . . . . . . . . . . . . . . . . . . . 24
11
Request grant examples . . . . . . . . . . . . . . . . . 25
12
Characteristics of the I2C-bus . . . . . . . . . . . . 25
12.1
Bit transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
12.2
START and STOP conditions . . . . . . . . . . . . . 26
12.3
System configuration . . . . . . . . . . . . . . . . . . . 26
12.4
Acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . 27
12.5
Bus transactions . . . . . . . . . . . . . . . . . . . . . . . 28
12.6
Auto-increment . . . . . . . . . . . . . . . . . . . . . . . . 29
13
General call software reset. . . . . . . . . . . . . . . 30
14
Device ID (PCA9641 ID field) . . . . . . . . . . . . . 31
15
Shared mailbox . . . . . . . . . . . . . . . . . . . . . . . . 32
16
Application design-in information . . . . . . . . . 33
16.1
Specific applications. . . . . . . . . . . . . . . . . . . . 34
16.2
High reliability systems . . . . . . . . . . . . . . . . . 34
16.3
Masters with shared resources . . . . . . . . . . . 35
16.4
Gatekeeper multiplexer . . . . . . . . . . . . . . . . . 36
16.5
Bus initialization/recovery to initialize slaves
without hardware reset. . . . . . . . . . . . . . . . . . 37
16.6
Power-on reset requirements. . . . . . . . . . . . . 37
17
Limiting values . . . . . . . . . . . . . . . . . . . . . . . . 39
18
Static characteristics . . . . . . . . . . . . . . . . . . . 40
19
Dynamic characteristics. . . . . . . . . . . . . . . . . 41
20
Test information . . . . . . . . . . . . . . . . . . . . . . . 44
21
Package outline. . . . . . . . . . . . . . . . . . . . . . . . 45
22
Soldering of SMD packages . . . . . . . . . . . . . . 47
22.1
Introduction to soldering. . . . . . . . . . . . . . . . . 47
22.2
Wave and reflow soldering. . . . . . . . . . . . . . . 47
22.3
Wave soldering . . . . . . . . . . . . . . . . . . . . . . . 47
22.4
Reflow soldering . . . . . . . . . . . . . . . . . . . . . . 48
23
Soldering: PCB footprints . . . . . . . . . . . . . . . 50
24
Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . 52
25
Revision history . . . . . . . . . . . . . . . . . . . . . . . 52
26
Legal information . . . . . . . . . . . . . . . . . . . . . . 53
26.1
Data sheet status . . . . . . . . . . . . . . . . . . . . . . 53
26.2
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
26.3
Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . 53
26.4
Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . 54
27
Contact information . . . . . . . . . . . . . . . . . . . . 54
28
Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55



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