ST72F264G2B6 STMicroelectronics, ST72F264G2B6 Datasheet - Page 193

• 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

Table 141. Watchdog Timeout for some Counter_Data values at fosc2 = 8MHz for
ST72F521 device
Table 142. WDG_ComputeTimeout
Notes:
– This function will give the approximate Timeout. For more accurate results you must do the
– If the selected Watchdog Timeout is not possible, you will get the next possible value
– To prevent the Watchdog reset this routine must be called when the Watchdog counter val-
Function Name
Function Prototype
Behaviour Description
Input Parameter
Output Parameter
Required Preconditions
Functions called
Postconditions
calculations as per the formulas given in the datasheet and call the previous function for
loading counter value.
ue.:
1. is greater than 0x3F
2. and lower than the Window register for Window Watchdog
1) This condition is valid only for Window Watchdog
Counter_Data
0x3f to 0x00
0x40
0x50
0x60
0x70
0x7f
WDG_ComputeTimeout
Void WDG_ComputeTimeout (unsigned long
WDG_Timeout)
Sets the value of Watchdog counter as per the selected
Timeout and activates the watchdog.
WDG_Timeout
Required Watchdog Timeout. This value must be entered
in microseconds.
None
You must define Fcpu and Fosc2 in ST7lib_config.h cor-
rectly.
None
1.The Watchdog is activated after this function and can
not be disabled, except by a reset.
2.A Reset is generated after a time approximately equal
to WDG_Timeout (If the Watchdog counter is not
changed in between)
3. For window watchdog a reset is generated, also if this
routine is called when the Watchdog counter value is
greater than the Window register value
Watchdog Timeout (ms)
128
0.0
1.5
34
65
98
Function Descriptions
1)
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