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ST72325AR7-Auto データシート(PDF) 7 Page - STMicroelectronics

部品番号 ST72325AR7-Auto
部品情報  SCI asynchronous serial interface
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST72325AR7-Auto データシート(HTML) 7 Page - STMicroelectronics

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Contents
Doc ID 13770 Rev 3
7/243
14.8.3
Data I/O register (SPIDR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
15
Serial communications interface (SCI) . . . . . . . . . . . . . . . . . . . . . . . . 139
15.1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
15.2
Main features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
15.3
General description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
15.4
Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
15.4.1
Serial data format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
15.4.2
Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
15.4.3
Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
15.5
Low power modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
15.6
Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
15.7
SCI registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
15.7.1
Status register (SCISR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
15.7.2
Control register 1 (SCICR1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
15.7.3
Control register 2 (SCICR2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
15.7.4
Data register (SCIDR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
15.7.5
Baud rate register (SCIBRR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
15.7.6
Extended receive prescaler division register (SCIERPR) . . . . . . . . . . 156
15.7.7
Extended transmit prescaler division register (SCIETPR) . . . . . . . . . . 157
16
I2C bus interface (I2C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
16.1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
16.2
Main features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
16.2.1
I2C master features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
16.2.2
I2C slave features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
16.3
General description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
16.3.1
Mode selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
16.3.2
Communication flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
16.3.3
SDA/SCL line control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
16.4
Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
16.4.1
Slave mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
16.4.2
Master mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
16.5
Low power modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
16.6
Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
16.7
Register description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168


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