ST72F324BJ6T6 STMicroelectronics, ST72F324BJ6T6 Datasheet - Page 154

• Manufacturer Part Number: ST72F324BJ6T6
• Description: IC MCU 8BIT 32K FLASH 44-LQFP
• Manufacturer: STMicroelectronics
• Series: ST7r

Specifications of ST72F324BJ6T6

• Core Processor: ST7
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI, SPI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 3.8 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• Processor Series: ST72F3x
• Core: ST7
• Data Bus Width: 8 bit
• Data Ram Size: 1 KB
• Interface Type: SCI, SPI
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 3
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: ST7232X-EVAL, ST7MDT20-DVP3, ST7MDT20J-EMU3, STX-RLINK
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 12 Channel
• For Use With: 497-6421 - BOARD EVAL DGTL BATT CHGR DESIGN497-5046 - KIT TOOL FOR ST7/UPSD/STR7 MCU
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details
• Other names: 497-5590

Electrical characteristics
12.6.3
154/198
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 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
Figure 64. Typical application with a crystal or ceramic resonator (8/16 Kbyte Flash
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
When resonator with
integrated capacitors
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
and ROM devices)
L1
L2
and C
it is recommended to use high-quality ceramic capacitors in the 5pF to 25pF range (typ.)
Parameter
L2
, are usually the same size. The crystal manufacturer typically specifies a load
L1
C
and C
L2
(2)
C
(1)
L1
S
L2
)
(3)
Doc ID13466 Rev 4
(10 pF can be used as a rough estimate of the combined pin and board
Resonator
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
L1
DD
S
S
S
S
and C
= 200LP oscillator
= 200 MP oscillator
= 200 MS oscillator
= 100 HS oscillator
OSC1
OSC2
= 5V, V
L2
Conditions
. PCB and MCU pin capacitance must be
IN
R
F
= V
SS
i
2
Min Typ Max Unit
>2
>4
>8
20
22
22
18
15
1
ST72XXX
f
OSC
ST72324B-Auto
160
310
610
80
150
250
460
910
16
40
56
46
33
33
2
4
8
MHz
k
pF
µA