ST7232AK2-Auto STMicroelectronics, ST7232AK2-Auto Datasheet - Page 162

• Manufacturer Part Number: ST7232AK2-Auto
• Description: 8-bit MCU for automotive, 16 Kbyte Flash, 10-bit ADC, 4 timers, SPI, SCI
• Manufacturer: STMicroelectronics

Specifications of ST7232AK2-Auto

• Hdflash Endurance: 100 cycles, data retention
• Clock Sources: crystal/ceramic resonator oscillators 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, PWM and pulse generator modes

Electrical characteristics
12.5.3
162/201
Crystal and ceramic resonator oscillators
The ST7 internal clock can be supplied with four different crystal/ceramic resonator
oscillators. All the information given in this paragraph are based on characterization results
with specified typical external components. In the application, the resonator and the load
capacitors have to be placed as close as possible to the oscillator pins in order to minimize
output distortion and start-up stabilization time. Refer to the crystal/ceramic resonator
manufacturer for more details (frequency, package, accuracy...).
Table 78.
1. The oscillator selection can be optimized in terms of supply current using a high quality resonator with
2. Data based on characterisation results, not tested in production.
Figure 66. Typical application with a crystal or ceramic resonator
Symbol
f
R
C
C
i
2
OSC
F
L1
L2
When resonator with integrated capacitors
small R
S
Oscillator frequency
Feedback resistor
Recommended load capacitance
versus equivalent serial resistance of
the crystal or ceramic resonator (R
OSC2 driving current
value. Refer to crystal/ceramic resonator manufacturer for more details.
Oscillator parameters
C
L2
Parameter
C
L1
(2)
(1)
Resonator
S
)
LP: Low power oscillator
MP: Medium power oscillator
MS: Medium speed oscillator
HS: High speed oscillator
R
R
R
R
V
LP oscillator
MP oscillator
MS oscillator
HS oscillator
OSC1
OSC2
IN
S
S
S
S
= 200Ω LP oscillator
= 200Ω MP oscillator
= 200Ω MS oscillator
= 100ΩHS oscillator
= V
SS
Conditions
R
F
i
2
Min
ST7232Axx-Auto
160
310
610
>2
>4
>8
20
22
22
18
15
80
1
f
ST72XXX
OSC
Max
150
250
460
910
16
40
56
46
33
33
2
4
8
MHz
Unit
µA
kΩ
pF