ST72324BJ6 STMicroelectronics, ST72324BJ6 Datasheet - Page 150

• Manufacturer Part Number: ST72324BJ6
• Description: 5V RANGE 8-BIT MCU WITH 8 TO 32K FLASH/ROM, 10-BIT ADC, 4 TIMERS, SPI, SCI INTERFACE
• Manufacturer: STMicroelectronics

Specifications of ST72324BJ6

• Hdflash Endurance: 1 kcycle at 55 °C, data retention 40 years at 85 °C
• Clock Sources: crystal/ceramic resonator oscillators, int. RC osc. and ext. clock input
• 4 Power Saving Modes: Slow, Wait, Active-halt, and Halt

Electrical characteristics
12.6.3
150/193
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...).
8/16 Kbyte Flash and ROM devices
Table 95.
1. The oscillator selection can be optimized in terms of supply current using an high quality resonator with
2. Data based on characterization results, not tested in production. The relatively low value of the RF resistor,
3. For C
Symbol
f
C
C
OSC
R
small R
offers a good protection against issues resulting from use in a humid environment, due to the induced
leakage and the bias condition change. However, it is recommended to take this point into account if the
microcontroller is used in tough humidity conditions.
designed for high-frequency applications and selected to match the requirements of the crystal or
resonator. C
capacitance which is the series combination of C
included when sizing C
capacitance).
i
L1
L2
2
F
L1
S
Oscillator frequency
Feedback resistor
Recommended load capacitance
versus equivalent serial
resistance of the crystal or
ceramic resonator (R
OSC2 driving current
and C
value. Refer to crystal/ceramic resonator manufacturer for more details.
Crystal and ceramic resonator oscillators (8/16 Kbyte Flash and ROM
devices)
L1
L2
and C
it is recommended to use high-quality ceramic capacitors in the 5 pF to 25 pF range (typ.)
Parameter
L2
, are usually the same size. The crystal manufacturer typically specifies a load
L1
and C
(2)
(1)
S
L2
)
(3)
(10 pF can be used as a rough estimate of the combined pin and board
LP: low power oscillator
MP: medium power oscillator
MS: medium speed oscillator
HS: high speed oscillator
R
R
R
R
V
L1
DD
S
S
S
S
and C
= 200 Ω
= 200 Ω
= 200 Ω
= 100 Ω
= 5V, V
L2
Conditions
. PCB and MCU pin capacitance must be
IN
= V
LP oscillator
MP oscillator
MS oscillator
HS oscillator
LP oscillator
MP oscillator
MS oscillator
HS oscillator
SS
Min Typ Max Unit
>2
>4
>8
20
22
22
18
15
1
160
310
610
80
ST72324Bxx
150
250
460
910
16
40
56
46
33
33
2
4
8
MHz
kΩ
pF
µA