ST72321AR9-Auto STMicroelectronics, ST72321AR9-Auto Datasheet - Page 162

• Manufacturer Part Number: ST72321AR9-Auto
• Description: 8-bit MCU for automotive with 60 Kbyte Flash, 10-bit ADC, timers, SPI, SCI and I2C interfaces
• Manufacturer: STMicroelectronics

Specifications of ST72321AR9-Auto

• Hdflash Endurance: 100 cycles, data retention 20 years
• Clock Sources: crystal/ceramic resonator oscillators, internal RC oscillator and bypass for external clock
• 4 Power Saving Modes: Halt, Active Halt, Wait and Slow

I2C bus interface (I2C)
Figure 68. Transfer sequencing
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7-bit Slave receiver:
7-bit Slave transmitter:
7-bit Master receiver:
7-bit Master transmitter:
10-bit Slave receiver:
10-bit Slave transmitter:
10-bit Master transmitter:
10-bit Master receiver:
Legend:
S Address
S Address
S
S
S
S
EV5
EV5
EV5
Header
S = Start, Sr = Repeated Start, P = Stop, A = Acknowledge, NA = Non-acknowledge, EVx = Event (with interrupt if ITE = 1)
EV1: EVF = 1, ADSL = 1, cleared by reading SR1 register.
EV2: EVF = 1, BTF = 1, cleared by reading SR1 register followed by reading DR register.
EV3: EVF = 1, BTF = 1, cleared by reading SR1 register followed by writing DR register.
EV3-1: EVF = 1, AF = 1, BTF = 1; AF is cleared by reading SR1 register. BTF is cleared by releasing the lines (STOP = 1, STOP = 0) or
by writing DR register (DR = FFh). Note: If lines are released by STOP = 1, STOP = 0, the subsequent EV4 is not seen.
EV4: EVF = 1, STOPF = 1, cleared by reading SR2 register.
EV5: EVF = 1, SB = 1, cleared by reading SR1 register followed by writing DR register.
EV6: EVF = 1, cleared by reading SR1 register followed by writing CR register (for example PE = 1).
EV7: EVF = 1, BTF = 1, cleared by reading SR1 register followed by reading DR register.
EV8: EVF = 1, BTF = 1, cleared by reading SR1 register followed by writing DR register.
EV9: EVF = 1, ADD10 = 1, cleared by reading SR1 register followed by writing DR register.
Address
Address
Header
A
A
A
EV1
EV1 EV3
Address
A
A
A
EV6
EV9
EV6 EV8
Data1
S
S
A
Address
r
Data1
Data1
r
Header A
EV5
EV1
A
Data1
EV2
Header
A
A
Data1
A
Doc ID 13829 Rev 1
EV3
EV7
EV6 EV8
Data2
EV1 EV3
A
A
A
EV8
Data2
Data2
EV6
EV2
A
Data1
Data2
Data1
EV2
Data1
A
A
.....
EV3
EV7
.....
A
A
A
DataN
A
EV3
EV8
.....
.....
EV8
DataN
EV7
....
.
.....
DataN
DataN
.....
A
.....
DataN
EV2
A
DataN
DataN
EV2
DataN
NA
NA
P
A
ST72321xx-Auto
EV3-1
EV7
EV4
P
EV3-1
A
A
EV4
A
P
EV8
EV8
EV7
P
P
EV4
EV4
P
P
P