ST72651AR6 STMicroelectronics, ST72651AR6 Datasheet - Page 108

• Manufacturer Part Number: ST72651AR6
• Description: LOW-POWER, FULL-SPEED USB 8-BIT MCU WITH 32K FLASH, 5K RAM, FLASH CARD I/F, TIMER, PWM, ADC, I2C, SPI
• Manufacturer: STMicroelectronics

Specifications of ST72651AR6

• Dual Supply Management: analog voltage detector on the USB power line to enable smart power switching from USB power to battery (on E suffix devices).
• Programmable Internal Voltage Regulator For Memory Cards (2.8v To 3.5v) Supplying: Flash Card I/O lines (voltage shifting)
• 5 Usb Endpoints: 1 control endpoint
• Dtc (data Transfer Coprocessor): Universal Serial/Parallel communications interface, with software plug-ins for current and future protocol standards

ST72651AR6
I²C SINGLE MASTER BUS INTERFACE (Cont’d)
Figure 64. Transfer Sequencing
Legend:
S=Start, P=Stop, A=Acknowledge, NA=Non-acknowledge
EVx=Event (with interrupt if ITE=1)
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Master transmitter:
Master receiver:
S
S
EV1: EVF=1, SB=1, cleared by reading SR1 register followed by writing DR register.
EV2: EVF=1, cleared by reading SR1 register followed by writing CR register (for example PE=1).
EV3: EVF=1, BTF=1, cleared by reading SR1 register followed by reading DR register.
EV4: EVF=1, BTF=1, cleared by reading SR1 register followed by writing DR register.
EV1
EV1
Address
Address
A
A
EV2
EV2 EV4
Data1
Data1
A
Doc ID 7215 Rev 4
EV3
A
EV4
Data2
Data2
A
EV3
A
EV4
.....
.....
DataN
DataN
NA
EV3
A
EV4
P
P