LPC2921 datasheet(81/81 Pages) PHILIPS

81 / 81 page

NXP Semiconductors

LPC2921/2923/2925

ARM9 microcontroller with CAN and LIN

For more information, please visit: http://www.nxp.com

For sales office addresses, please send an email to: salesaddresses@nxp.com

Date of release: 24 October 2008

Document identifier: LPC2921_2923_2925_0

Please be aware that important notices concerning this document and the product(s)

described herein, have been included in section ‘Legal information’.

6.15.1

Clock description . . . . . . . . . . . . . . . . . . . . . . 41

6.15.2

Clock Generation Unit (CGU0) . . . . . . . . . . . . 42

6.15.2.1

Functional description. . . . . . . . . . . . . . . . . . . 42

6.15.2.2

PLL functional description . . . . . . . . . . . . . . . 45

6.15.2.3

Pin description . . . . . . . . . . . . . . . . . . . . . . . . 46

6.15.3

Clock generation for USB (CGU1) . . . . . . . . . 46

6.15.3.1

Pin description . . . . . . . . . . . . . . . . . . . . . . . . 47

6.15.4

Reset Generation Unit (RGU). . . . . . . . . . . . . 47

6.15.4.1

Functional description. . . . . . . . . . . . . . . . . . . 47

6.15.4.2

Pin description . . . . . . . . . . . . . . . . . . . . . . . . 48

6.15.5

Power Management Unit (PMU). . . . . . . . . . . 48

6.15.5.1

Functional description. . . . . . . . . . . . . . . . . . . 49

6.16

Vectored interrupt controller . . . . . . . . . . . . . . 51

6.16.1

Functional description. . . . . . . . . . . . . . . . . . . 51

6.16.2

Clock description . . . . . . . . . . . . . . . . . . . . . . 52

Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 53

Static characteristics . . . . . . . . . . . . . . . . . . . . 55

8.1

Power consumption . . . . . . . . . . . . . . . . . . . . 59

8.2

Electrical pin characteristics . . . . . . . . . . . . . . 60

Dynamic characteristics . . . . . . . . . . . . . . . . . 63

9.1

Dynamic characteristics: I/O pins, internal clock,

oscillators, PLL, and CAN. . . . . . . . . . . . . . . . 63

9.2

USB interface . . . . . . . . . . . . . . . . . . . . . . . . . 64

9.3

Dynamic characteristics: I2C-bus interface. . . 65

9.4

Dynamic characteristics: SPI . . . . . . . . . . . . . 66

9.5

Dynamic characteristics: flash memory . . . . . 69

9.6

Dynamic characteristics: ADC1/2 . . . . . . . . . 70

Application information. . . . . . . . . . . . . . . . . . 70

10.1

Operating frequency selection . . . . . . . . . . . . 70

10.2

Suggested USB interface solutions . . . . . . . . 71

Package outline . . . . . . . . . . . . . . . . . . . . . . . . 73

Soldering of SMD packages . . . . . . . . . . . . . . 74

12.1

Introduction to soldering . . . . . . . . . . . . . . . . . 74

12.2

Wave and reflow soldering . . . . . . . . . . . . . . . 74

12.3

Wave soldering . . . . . . . . . . . . . . . . . . . . . . . . 74

12.4

Reflow soldering . . . . . . . . . . . . . . . . . . . . . . . 75

Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . 77

References . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Revision history . . . . . . . . . . . . . . . . . . . . . . . . 78

Legal information. . . . . . . . . . . . . . . . . . . . . . . 79

16.1

Data sheet status . . . . . . . . . . . . . . . . . . . . . . 79

16.2

Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

16.3

Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

16.4

Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Contact information. . . . . . . . . . . . . . . . . . . . . 79

Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

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