UPSD3234A-40U6T STMicroelectronics, UPSD3234A-40U6T Datasheet - Page 58

• Manufacturer Part Number: UPSD3234A-40U6T
• Description: IC MCU 8032 64KB FLASH 80TQFP
• Manufacturer: STMicroelectronics
• Series: µPSDr

Specifications of UPSD3234A-40U6T

• Core Processor: 8032
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, UART/USART, USB
• Peripherals: LVR, POR, PWM, WDT
• Number Of I /o: 46
• Program Memory Size: 288KB (288K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 4x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-TQFP, 80-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Watchdog timer
58/189
Figure 20. RESET pulse width
Table 34.
Table 35.
1. The Watchdog Timer (WDT) is enabled at power-up or reset and must be served or disabled.
Reserved
6 to 0
Bit
7
7
Watchdog timer clear register (WDRST: 0A6h)
WDRST6
Description of the WDRST Bits
WDRST6
WDRST0
Symbol
—
to
6
Reserved
To reset watchdog timer, write any value beteen 00h and 7Eh to this
register.
This value is loaded to the 7 most significant bits of the 22-bit counter.
For example: MOV WDRST,#1EH
WDRST5
5
(about 6.291 seconds at 8Mhz)
(1.258 second at 40Mhz)
UPSD3234A, UPSD3234BV, UPSD3233B, UPSD3233BV
WDRST4
Reset period
Reset pulse width (about 10ms at 40Mhz, about 50ms at 8Mhz)
4
WDRST3
3
Function
WDRST2
2
WDRST1
1
AI06823
WDRST0
0