| 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 |
| C1 |
SCG, nominal frequency not at center of taps (x313 devices)
Modification: Adjusted nominal frequency to center (DCO tap 13) |
| 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. |
| L1 |
LCD
OscOff is set, the ICC is unstable due to an internal floating node
Workaround: reset LCDM2 bit in LCDCTL reg.
Modification: LCD is switched off with OscOff. |
| L2 |
LCD, voltage needed between VCC and VSS
Modified analog switches (in x313 devices) to reduce needed external
voltage across VCC(R33) to VSS (R03). |
|
|
Osc32, lack of reliable start and operation of the crystal oscillator
Workaround: Two 12pF capacitors from XIN and XOUT to VSS or
1MOhm from XOUT to VSS
Modification:
Corrected feedback resistor responsible for DC operating point. Startup
improved. |
|
O3
|
Osc32, lack of reliable start and operation of the crystal oscillator
Workaround: Two 12pF capacitors from XIN and XOUT to VSS or
1MOhm from XOUT to VSS
Modification:
Positive feedback capacitor removed. It corrects variationof fACLK
vs. supply voltage,
and corrects oscillator problems atVCC>4.5 V,
and corrects oscillation at harmonics,
and corrects start-up behaviour. |
|
|
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. |
