ST72325R6-AUTO STMicroelectronics, ST72325R6-AUTO Datasheet - Page 7
ST72325R6-AUTO
Manufacturer Part Number
ST72325R6-AUTO
Description
8-bit Mcu For Automotive With 16 To 60 Kbyte Flash, Adc, Css, 5 Timers, Spi, Sci, I2c Interface
Manufacturer
STMicroelectronics
Datasheet
1.ST72325R6-AUTO.pdf
(250 pages)
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ST72325xxx-Auto
15
16
14.7
14.8
Serial communications interface (SCI) . . . . . . . . . . . . . . . . . . . . . . . . 144
15.1
15.2
15.3
15.4
15.5
15.6
15.7
I2C bus interface (I2C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
16.1
16.2
16.3
16.4
14.6.1
Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
SPI registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
14.8.1
14.8.2
14.8.3
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
Main features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
General description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
15.4.1
15.4.2
15.4.3
Low power modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
SCI registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
15.7.1
15.7.2
15.7.3
15.7.4
15.7.5
15.7.6
15.7.7
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
Main features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
16.2.1
16.2.2
General description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
16.3.1
16.3.2
16.3.3
Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
Using the SPI to wake up the MCU from Halt mode . . . . . . . . . . . . . . 139
Control register (SPICR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
Control/status register (SPICSR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Data I/O register (SPIDR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
Serial data format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
Status register (SCISR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
Control register 1 (SCICR1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
Control register 2 (SCICR2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
Data register (SCIDR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
Baud rate register (SCIBRR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
Extended receive prescaler division register (SCIERPR) . . . . . . . . . . 161
Extended transmit prescaler division register (SCIETPR) . . . . . . . . . . 162
I2C master features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
I2C slave features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
Mode selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
Communication flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
SDA/SCL line control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
Contents
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