ST72F264G2B6 STMicroelectronics, ST72F264G2B6 Datasheet - Page 117
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ST72F264G2B6
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
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Company
Part Number
Manufacturer
Quantity
Price
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10-BIT A/D CONVERTER (ADC) (Cont’d)
11.7.3.2 Digital A/D Conversion Result
The conversion is monotonic, meaning that the re-
sult never decreases if the analog input does not
and never increases if the analog input does not.
If the input voltage (V
(high-level voltage reference) then the conversion
result is FFh in the ADCDRH register and 03h in
the ADCDRL register (without overflow indication).
If the input voltage (V
level voltage reference) then the conversion result
in the ADCDRH and ADCDRL registers is 00 00h.
The A/D converter is linear and the digital result of
the conversion is stored in the ADCDRH and AD-
CDRL registers. The accuracy of the conversion is
described in the Electrical Characteristics Section.
R
for an analog input signal. If the impedance is too
high, this will result in a loss of accuracy due to
leakage and sampling not being completed in the
alloted time.
11.7.3.3 A/D Conversion
The analog input ports must be configured as in-
put, no pull-up, no interrupt. Refer to the «I/O
ports» chapter. Using these pins as analog inputs
does not affect the ability of the port to be read as
a logic input.
In the ADCCSR register:
– Select the CH[2:0] bits to assign the analog
ADC Conversion mode
In the ADCCSR register:
- Set the SPEED or the SLOW bits
– Set the ADON bit to enable the A/D converter
AIN
channel to convert.
and to start the conversion. From this time on,
the ADC performs a continuous conversion of
the selected channel.
is the maximum recommended impedance
AIN
AIN
) is lower than V
) is greater than V
SSA
(low-
DDA
When a conversion is complete:
A read to the ADCDRH or a write to any bit of the
ADCCSR resets the EOC bit.
To read the 10 bits, perform the following steps:
1. Poll EOC bit
2. Read ADCDRL. This locks the ADCDRH until it
3. Read ADCDRH. This clears EOC automati-
To read only 8 bits, perform the following steps:
1. Poll EOC bit
2. Read ADCDRH. This clears EOC automati-
11.7.4 Low Power Modes
Note: The A/D converter may be disabled by re-
setting the ADON bit. This feature allows reduced
power consumption when no conversion is need-
ed and between single shot conversions.
11.7.5 Interrupts
None.
Mode
WAIT
HALT
– The EOC bit is set by hardware.
– The result is in the ADCDR registers.
is read.
cally.
cally.
ST72260Gx, ST72262Gx, ST72264Gx
Description
No effect on A/D Converter
A/D Converter disabled.
After wakeup from Halt mode, the A/D
Converter requires a stabilization time
t
before accurate conversions can be
performed.
STAB
(see Electrical Characteristics)
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