ST72F264G2B6 STMicroelectronics, ST72F264G2B6 Datasheet - Page 170

• Manufacturer Part Number: ST72F264G2B6
• Description: MCU 8-BIT 8K FLASH 32-SDIP
• Manufacturer: STMicroelectronics
• Series: ST7r

Specifications of ST72F264G2B6

• Mfg Application Notes: ST7 Checksum Capability, AN1070 App Note
• Core Processor: ST7
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: I²C, SCI, 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): 2.7 V ~ 5.5 V
• Data Converters: A/D 6x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-SDIP (0.400", 10.16mm)
• Processor Series: ST72F2x
• Core: ST7
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: I2C, SCI, SPI
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 22
• Number Of Timers: 3
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• Development Tools By Supplier: ST7F264-IND/USB, ST72F34X-SK/RAIS, ST7MDT10-DVP3, ST7MDT10-EMU3, STX-RLINK
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 6 Channel
• For Use With: 497-6423 - BOARD EVAL BASED ON ST72264G1497-5046 - 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: 497-5570

ST72260Gx, ST72262Gx, ST72264Gx
bit) accuracy does not meet the accuracy specified
in the data sheet.
Workaround
In order to have the accuracy specified in the da-
tasheet, the first conversion after a ADC switch-on
has to be ignored.
16.2.11 Negative injection impact on ADC
accuracy
Injecting a negative current on an analog input
pins significantly reduces the accuracy of the AD
Converter. Whenever necessary, the negative in-
jection should be prevented by the addition of a
Schottky diode between the concerned I/Os and
ground.
170/172
Injecting a negative current on digital input pins
degrades ADC accuracy especially if performed
on a pin close to ADC channel in use.
16.2.12 ADC conversion spurious results
Spurious conversions occur with a rate lower than
50 per million. Such conversions happen when the
measured voltage is just between 2 consecutive
digital values.
Workaround
A software filter should be implemented to remove
erratic conversion results whenever they may
cause unwanted consequences.