cy8c3446lti-075es2 Cypress Semiconductor Corporation., cy8c3446lti-075es2 Datasheet - Page 12

• Manufacturer Part Number: cy8c3446lti-075es2
• Description: Psoc? 3 Cy8c34 Family Errata Silicon Revision Es2
• Manufacturer: Cypress Semiconductor Corporation.

13. WDT Does Not Work in Low Power Modes
14. WDT Cleared Once, Does Not Time Out
January 7, 2011
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PROBLEM DEFINITION
The Watchdog Timer (WDT) does not work in low power modes (Sleep and Hibernate).
PARAMETERS AFFECTED
NA
TRIGGER CONDITION(S)
NA
SCOPE OF IMPACT
The WDT will not reset the device during low power modes. The device will stay in the low power mode and
stop responding to all other stimulus if a WDT reset occurs in the low power mode.
WORKAROUND
1. Do not use the WDT and low power modes in the same application
2. If low power modes and the WDT must be used in the same application, ensure that the device wakes
FIX STATUS
Silicon revision fix confirmed in production silicon.
PROBLEM DEFINITION
If the Watchdog Timer (WDT) is cleared once, it does not time out.
PARAMETERS AFFECTED
NA
TRIGGER CONDITION(S)
NA
SCOPE OF IMPACT
The WDT will not reset the device after it has been cleared.
WORKAROUND
After each watchdog clear operation performed by writing WDT_CR (0x4384); also immediately write a zero
to WDT_CFG(0x4383).
FIX STATUS
Silicon revision fix confirmed in production silicon.
from the low power mode and the WDT is serviced before a WDT reset can occur
Document Number: 001-61136 Rev. *C
Errata Document
PSoC
®
3: CY8C34 Family
12
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