cy8c3446lti-075es2 Cypress Semiconductor Corporation., cy8c3446lti-075es2 Datasheet - Page 26

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

40. Interrupts
41. Fixed Function Timer Capture
42. Fixed Function Timer ISR
January 7, 2011
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PROBLEM DEFINITION
When two or more interrupts of different priorities are enabled at the same time and the higher priority interrupt
triggers at approximately the same time that the lower priority interrupt being serviced returns, the lower priority
interrupt may stop responding.
PARAMETERS AFFECTED
NA
TRIGGER CONDITION(S)
When two interrupts of different priorities are enabled at the same time and the higher priority interrupt triggers
at approximately the same time that the lower priority interrupt being serviced returns.
SCOPE OF IMPACT
The lower priority interrupt will stop servicing it’s interrupt when triggered until the device is Reset.
WORKAROUND
There are two workarounds available:
1. Set all interrupts to the same priority
2. Check the 'ES2' box in the Interrupts section under Design Wide Resources in PSoC Creator. This
FIX STATUS
Silicon revision fix confirmed in production silicon.
PROBLEM DEFINITION
When using a Fixed Function timer and configuring it to interrupt on capture, the first value returned when
reading the capture count value is 0xFF.
PARAMETERS AFFECTED
NA
TRIGGER CONDITION(S)
Reading the count value of a capture on a Fixed Function timer.
WORKAROUND
On initial capture, after calling the start API, read the capture count value twice and ignore the first read value.
FIX STATUS
Silicon revision fix confirmed in production silicon.
PROBLEM DEFINITION
Using an external clock supplied to an I/O pin may result in an ISR becoming executed multiple times for a
single interrupt condition. This issue does not apply when using a clock generated internal to the chip.
PARAMETERS AFFECTED
NA
TRIGGER CONDITION(S)
Triggering an ISR when using an external clock with a Fixed Function Timer component.
WORKAROUND
Use a UDB based Timer instead of a Fixed Function based Timer when interrupts are needed.
FIX STATUS
Silicon revision fix confirmed in production silicon.
implements a hex file patch, which allows interrupts of different priorities to be used
Document Number: 001-61136 Rev. *C
Errata Document
PSoC
®
3: CY8C34 Family
26
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