ST72325K4-Auto datasheet(6/243 Pages) STMICROELECTRONICS | SCI asynchronous serial interface

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ST72325K4-Auto Datasheet(PDF) 6 Page - STMicroelectronics

Part #	ST72325K4-Auto

Description	SCI asynchronous serial interface

Download	243 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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Contents

ST72325xxx-Auto

6/243

Doc ID 13770 Rev 3

13.7.3

Control/status register (CSR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

13.7.4

Input capture 1 high register (IC1HR) . . . . . . . . . . . . . . . . . . . . . . . . . 120

13.7.5

Input capture 1 low register (IC1LR) . . . . . . . . . . . . . . . . . . . . . . . . . . 121

13.7.6

Output compare 1 high register (OC1HR) . . . . . . . . . . . . . . . . . . . . . . 121

13.7.7

Output compare 1 low register (OC1LR) . . . . . . . . . . . . . . . . . . . . . . . 121

13.7.8

Output compare 2 high register (OC2HR) . . . . . . . . . . . . . . . . . . . . . . 121

13.7.9

Output compare 2 low register (OC2LR) . . . . . . . . . . . . . . . . . . . . . . . 122

13.7.10 Counter high register (CHR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

13.7.11 Counter low register (CLR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

13.7.12 Alternate counter high register (ACHR) . . . . . . . . . . . . . . . . . . . . . . . . 122

13.7.13 Alternate counter low register (ACLR) . . . . . . . . . . . . . . . . . . . . . . . . . 123

13.7.14 Input capture 2 high register (IC2HR) . . . . . . . . . . . . . . . . . . . . . . . . . 123

13.7.15 Input capture 2 low register (IC2LR) . . . . . . . . . . . . . . . . . . . . . . . . . . 123

14

Serial peripheral interface (SPI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

14.1

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

14.2

Main features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

14.3

General description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

14.3.1

Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

14.3.2

Slave select management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127

14.3.3

Master mode operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

14.3.4

Master mode transmit sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129

14.3.5

Slave mode operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129

14.3.6

Slave mode transmit sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129

14.4

Clock phase and clock polarity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130

14.5

Error flags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

14.5.1

Master mode fault (MODF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

14.5.2

Overrun condition (OVR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

14.5.3

Write collision error (WCOL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

14.5.4

Single master systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

14.6

Low power modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134

14.6.1

Using the SPI to wake up the MCU from Halt mode . . . . . . . . . . . . . . 134

14.7

Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134

14.8

SPI registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135

14.8.1

Control register (SPICR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135

14.8.2

Control/status register (SPICSR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

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