ST72521AR9 STMicroelectronics, ST72521AR9 Datasheet - Page 192

• Manufacturer Part Number: ST72521AR9
• Description: 8-BIT MCU WITH NESTED INTERRUPTS, FLASH, 10-BIT ADC, FIVE TIMERS, SPI, SCI, I2C, CAN INTERFACE
• Manufacturer: STMicroelectronics

Specifications of ST72521AR9

• Hdflash Endurance: 100 cycles, data retention
• Clock Sources: crystal/ceramic resonator oscillators, internal RC oscillator and bypass for external clock
• Four Power Saving Modes: Halt, Active-Halt, Wait and Slow
• Main Clock Controller With: Real time base, Beep and Clock-out capabilities
• Two 16-bit Timers With: 2 input captures, 2 output compares, external clock input on one timer, PWM and pulse generator modes
• 8-bit Pwm Auto-reload Timer With: 2 input captures, 4 PWM outputs, output compare and time base interrupt, external clock with event detector

ST72F521, ST72521B
COMMUNICATION INTERFACE CHARACTERISTICS (Cont’d)
The following table gives the values to be written in
the I2CCCR register to obtain the required I
SCL line frequency.
Table 28. SCL Frequency Table
Legend:
R
f
NA = Not achievable
Note:
– For speeds around 200 kHz, achieved speed can have ±5% tolerance
– For other speed ranges, achieved speed can have ±2% tolerance
The above variations depend on the accuracy of the external components used.
12.11.3 CAN - Controller Area Network Interface
Subject to general operating condition for V
Refer to I/O port characteristics for more details on the input/output alternate function characteristics
(CANTX and CANRX).
Notes:
1. Data based on simulation results, not tested in production
192/215
SCL
Symbol
t
P
p(RX:TX)
= External pull-up resistance
(kHz)
f
400
300
200
100
= I
SCL
50
20
2
C speed
CAN controller propagation time
R
P
=3.3kΩ
5Fh
83h
10h
24h
NA
NA
V
DD
Parameter
= 4.1 V
R
P
=4.7kΩ
5Fh
83h
10h
24h
NA
NA
f
CPU
=4 MHz.
R
P
1)
=3.3kΩ
83h
10h
24h
5Fh
NA
NA
V
DD
DD
, f
= 5 V
2
OSC
C
R
Conditions
P
=4.7kΩ
5Fh
83h
10h
24h
NA
NA
, and T
I2CCCR Value
A
R
unless otherwise specified.
P
=3.3kΩ
8Ah
4Ch
FFh
83h
85h
24h
V
DD
= 4.1 V
Min
R
P
=4.7kΩ
4Ch
85h
89h
23h
FFh
83
f
CPU
Typ
=8 MHz.
R
P
=3.3kΩ
8Ah
4Ch
FFh
83h
85h
24h
Max
V
60
DD
= 5 V
R
P
=4.7kΩ
4Ch
83h
85h
8Ah
23h
FFh
Unit
ns