ST72F264G2B6 STMicroelectronics, ST72F264G2B6 Datasheet - Page 195

• 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

EXAMPLE:
The following C program shows the use of the WDG library functions.
Program description:
This program generates the watchdog reset for ST72F521 device. The reset timeout period is
configured as 34ms with fosc2 = 8MHz, through function WDG_Refresh with input parameter
“Counter_Data” as 0x50 (See
Watchdog reset timeout can also be configured through WDG_ComputeTimeout function
(refer to the example below). Here it is configured for a reset timeout of 20,000µs with input
parameter WDG_Timeout given as 20,000.
In Window Watchdog, the reset can be generated by reloading the WDG counter register out-
side the Window. In the example it is generated after 1ms
/******************************** Program Start **********************************/
#include "ST7lib_config.h"
void main(void);
void main (void)
{
}
unsigned int i;
/*-----------------------------------------------------------------------------
-----------------------------------------------------------------------------*/
WDG_Refresh (0x50);
/*-----------------------------------------------------------------------------
-----------------------------------------------------------------------------*/
/*WDG_ComputeTimeout (50000); */
/*----------------------------------------------------------------------------
-----------------------------------------------------------------------------*/
#ifdef WDG_72F561
WDG_Refresh(0x50) ;
WDG_WriteWindow(0x48)
for (i = 0; i < 532; i++) ;
WDG_Refresh(0x50);
#endif
while (1);
WDG_Refresh function to generate a reset after 34ms at fosc2 = 8MHz
WDG_ComputeTimeout function to generate a reset after 20ms (MCC timebase:
4ms, fosc2 = 8MHz)
Window
18.432ms at fosc2 = 8MHz. Reset is generated after 1ms by reloading the WDG
counter register outside the window.
Watchdog for setting a Refresh Period of 34ms and a Window Size of
Table
141).
/* Generates Reset on execution of this routine */
/* Set a Refresh period of 34ms */
/*Generates reset after 34ms*/
/*Generates reset after 20ms*/
Function Descriptions
/*1ms delay */
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