Information

 2009-2013 Microchip Technology Inc. DS80000487K-page 3
PIC24FJ64GB004
Silicon Errata Issues
1. Module: Output Compare
(Cascaded Mode)
When using Cascaded (32-bit) mode, Trigger
and Synchronous modes do not work as
expected. The even numbered module does not
become synchronized to the odd numbered
module, resulting in errors in the Most Signifi-
cant 16 bits of the output. In certain modes, the
even numbered module does not generate any
output. This behavior is independent of the
OCTRIG trigger/sync selection for the even
numbered module.
Work around
None.
Affected Silicon Revisions
2. Module: Power-Saving Modes
(Sleep Mode)
When entering Sleep mode, a transitory
increase over the specified Power-Down Base
Current (IPD) may occur. This has only been
observed in some parts and then only under
both of the following circumstances:
• the operating temperature is below -20°C; and
• Sleep mode is entered within 20 seconds of a
POR event.
Following the increase, I
PD returns to the normal
specified level at 20 seconds after the POR
event.
Deep Sleep mode is not affected.
Work around
None
Affected Silicon Revisions
This issue only applies to devices with date
codes prior to 1001NNN, as identified by the
package markings.
3. Module: USB
While operating in Host mode and attached to a
low-speed device through a full-speed USB hub,
the PRE signal may not be generated correctly.
This will result in not being able to communicate
correctly with the low-speed device.
Work around
Connect low-speed devices directly to the
application and not through a USB hub.
Affected Silicon Revisions
4. Module: USB
When the module is configured to use an external
transceiver, the CRC5 value of some packets may
be incorrect.
Work around
Use the module’s internal transceiver.
Affected Silicon Revisions
5. Module: UART
The UART module will not generate consecutive
Break characters. Trying to perform a back-to-
back Break character transmission will cause the
UART module to transmit the dummy character
used to generate the first Break character, instead
of transmitting the second Break character. Break
characters are generated correctly if they are
followed by non-Break character transmission.
Work around
None.
Affected Silicon Revisions
Note: This document summarizes all silicon
errata issues from all revisions of silicon,
previous as well as current. Only the
issues indicated by the shaded column in
the following tables apply to the current
silicon revision (A2).
A2
X
A2
X
A2
X
A2
X
A2
X