ST72C254G2M6 STMicroelectronics, ST72C254G2M6 Datasheet - Page 110
![IC MCU 8BIT 8K FLASH SOIC-28](/photos/6/56/65690/stmicroelectronics-28-soic_sml.jpg)
ST72C254G2M6
Manufacturer Part Number
ST72C254G2M6
Description
IC MCU 8BIT 8K FLASH SOIC-28
Manufacturer
STMicroelectronics
Series
ST7r
Datasheets
1.INDART-ST72C254.pdf
(3 pages)
2.ST72C104G1M6.pdf
(141 pages)
3.ST72C215G2M6.pdf
(140 pages)
Specifications of ST72C254G2M6
Core Processor
ST7
Core Size
8-Bit
Speed
16MHz
Connectivity
I²C, SPI
Peripherals
LVD, POR, PWM, WDT
Number Of I /o
22
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
3.2 V ~ 5.5 V
Data Converters
A/D 6x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
28-SOIC (7.5mm Width)
Controller Family/series
ST7
No. Of I/o's
22
Ram Memory Size
256Byte
Cpu Speed
8MHz
No. Of Timers
2
Rohs Compliant
Yes
Processor Series
ST72C2x
Core
ST7
Data Bus Width
8 bit
Data Ram Size
256 B
Interface Type
I2C, SPI
Maximum Clock Frequency
16 MHz
Number Of Programmable I/os
22
Number Of Timers
3 bit
Operating Supply Voltage
3.2 V to 5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Development Tools By Supplier
ST7MDT1-DVP2/US
Minimum Operating Temperature
- 40 C
On-chip Adc
8 bit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
In Transition
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ST72C254G2M6
Manufacturer:
ST
Quantity:
20 000
ST72104Gx, ST72215Gx, ST72216Gx, ST72254Gx
CLOCK CHARACTERISTICS (Cont’d)
13.5.4 RC Oscillators
The ST7 internal clock can be supplied with an RC
oscillator. This oscillator can be used with internal
Figure 66. Typical Application with RC oscillator
Figure 67. Typical Internal RC Oscillator
Notes:
1. Data based on characterization results.
2. Guaranteed frequency range with the specified C
Data based on design simulation.
3. Data based on characterization results done with V
4. R
5. Important: when no external C
is subject to high variation (package, application...). In this case, the RC oscillator frequency tuning has to be done by
trying out several resistor values.
110/141
f
t
R
C
Symbol
OSC
SU(OSC)
EX
EX
EXTERNAL RC
EX
fosc [MH z]
4.3
4.2
3.9
3.8
4.1
4
must have a positive temperature coefficient (ppm/°C), carbon resistors should therefore not be used.
3.2
Internal RC oscillator frequency
External RC oscillator frequency
Internal RC Oscillator Start-up Time
External RC Oscillator Start-up Time
Oscillator external resistor
Oscillator external capacitor
R
EX
C
EX
-40°C
+25° C
ST72XXX
OSC1
OSC2
V DD [V]
Parameter
EX
is applied, the capacitance to be considered is the global parasitic capacitance which
+85° C
+125°C
4)
INTERNAL RC
1)
2)
5.5
3)
3)
EX
DD
see
R
R
R
R
see
and R
EX
EX
EX
EX
nominal at 5V, not tested in production.
=47KΩ, C
=47KΩ, C
=10KΩ, C
=10KΩ, C
Figure 67
Figure 68
EX
Conditions
Voltage generator
or external components (selectable by option
byte).
Figure 68. Typical External RC Oscillator
V
ranges taking into account the device process variation.
REF
fosc [MHz]
20
15
10
5
0
EX
EX
EX
EX
=”0”pF
=100pF
=6.8pF
=470pF
0
+
-
6.8
22
3.60
Min
V
0
10
1
DD
5)
Cex [pF]
47
Typ
2.0
1.0
6.5
0.7
3.0
100
C
EX
Current copy
Rex= 10KOhm
Rex= 15KOhm
Rex= 22KOhm
Rex= 33KOhm
Rex= 39KOhm
Rex= 47KOhm
Max
discharge
5.10
470
14
47
270
f
OSC
MHz
Unit
KΩ
ms
470
pF