ST72521R9-Auto STMicroelectronics, ST72521R9-Auto Datasheet - Page 248

• Manufacturer Part Number: ST72521R9-Auto
• Description: 8-bit MCU for automotive
• Manufacturer: STMicroelectronics

Specifications of ST72521R9-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

Electrical characteristics
Figure 111. Typical application with I
1. Measurement points are done at CMOS levels: 0.3xV
Table 154. SCL frequency table
Note:
248/276
(kHz)
SDA
SCK
f
400
300
200
100
SCL
I
50
20
2
t
C BUS
f(SDA)
R
t
h(STA)
P
The following table provides the values to be written in the I2CCCR register to obtain the
required I
Legend:
- For speeds around 200 kHz, the achieved speed can have a
- For other speed ranges, the achieved speed can have a
The above variations depend on the accuracy of the external components used.
START
= 3.3k R
V
R
f
DD
4.7k
t
SCL
w(SCKH)
t
P
r(SDA)
= 4.1V
2
V
= External pull-up resistance
= I
C SCL line frequency.
P
DD
= 4.7k R
2
t
w(SCKL)
C speed
Not achievable
Not achievable
f
CPU
4.7k
83h
10h
24h
5Fh
= 4 MHz
V
DD
P
t
su(SDA)
= 3.3k R
t
r(SCK)
2
100
100
C BUS and timing diagram
V
DD
Doc ID 17660 Rev 1
= 5V
t
DD
h(SDA)
t
f(SCK)
P
and 0.7xV
= 4.7k R
SDAI
SCLI
I2CCCR value
ST72XXX
DD
.
P
= 3.3k R
8Ah
24h
V
DD
= 4.1V
(1)
±
P
2% tolerance.
= 4.7k R
89h
23h
t
f
su(STA)
±
CPU
5% tolerance.
t
4Ch
su(STO)
FFh
83h
85h
= 8 MHz
P
t
w(STO:STA)
= 3.3k R
24h
STOP
ST72521xx-Auto
REPEATED START
V
DD
8Ah
= 5V
P
START
= 4.7k
23h