UPSD3212B-24U6(2009) View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

UPSD3212B-24U6
(Rev.:2009)

Flash programmable system devices with 8032 MCU and USB and programmable logic

STMicroelectronics 

UPSD3212A, UPSD3212C, UPSD3212CV

Watchdog timer

Figure 20. RESET pulse width

Reset pulse width (about 10ms at 40Mhz, about 50ms at 8Mhz)

Reset period

(1.258 second at 40Mhz)

(about 6.291 seconds at 8Mhz)

AI06823

Table 34.

7

Reserved

Watchdog timer clear register (WDRST: 0A6h)

6

5

4

3

2

WDRST6 WDRST5 WDRST4 WDRST3 WDRST2

1

WDRST1

0

WDRST0

Table 35.

Bit

7

6 to 0

Description of the WDRST Bits

Symbol

Function

—

Reserved

WDRST6

to

WDRST0

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

1. The Watchdog Timer (WDT) is enabled at power-up or reset and must be served or disabled.

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