| Ref-# |
Comment |
| A4 |
PUSH #4, PUSH #8
The single operand instruction does not utilize from the internal constant
4 and 8.
But the other internal constants (0, 1, 2, -1) are used. The Assembler
version 1.08
produces correct code - two words, the instruction PUSH and 0004
or 0008.
Modification: not planned |
| E1 |
EPROM
The operating supply voltage is limited to 4.5V - 5.5V |
| F1 |
FUSE
The fuse is connected to VCC instead to TDI |
| F2 |
FUSE
Fuse is not released for application use |
| J2 |
JTAG, input path of TDO/TDI
The input path of the TDO/TDI input is a standard CMOS buffer. Undefined
levels
there can cause additional current consumption from VCC to VSS via
the gate.
Workaround: add an external pull-down resistor that avoids floating
node.
Modification:
The input buffer of the TDO/TDI input is modified to a gated input
and no further
ext. pull-down is needed in the application. |
|
J3
|
JTAG, OTP and EPROM devices only
The input path of the TDI/VPP input is a standard CMOS buffer. Undefined
levels
there can cause additional current consumption from VCC to VSS via
the gate.
Workaround: add an external pull-down resistor that avoids floating
node.
Modification:
The input buffer of the TDO/TDI input is modified to a gated input
and no further
ext. pull-down is needed in the application. |
| O5 |
Osc32, lack of reliable operation of the crystal oscillator
:
The oscillator works but at 5V operation and
temperature below 0oC it can stop
Workaround: Two 12pF capacitors from XIN and XOUT to VSS
The workaround may not work correctly on all conitions>>
It needs to be check in the specific application. |
|
R1
|
RST/NMI: Input is slower (ca. 30ns) by adding a Cap. to output
of
the input inverter - NOT to the RST/NMI pin |
|
S1
|
Interrupt: an interupt flag can be cleared by an interrupt request
with higher priority if the interrupt with higher priority is requested
during
bus grant cycle in the interrupt request service phase.
Workaround: none.
Modification: bug removed since |
