C4.PDF

(67 KB) Pobierz
Chip Errata
DSP56002 Digital Signal Processor
Mask: D41G
ERRATA
Errata Description
1. Timing 170 is not guaranteed for a period of 1000 ETc after PLOCK assertion fol-
lowing the events listed below:
a. When enabling the PLL operation by software.
b. When changing the multiplication factor.
c. When recovering from the STOP state if the PLL was turned off and it is sup-
posed to turn-on when exiting the STOP state.
2. The timing of the acknowledge pulse (timing 240 in the data sheet) on the OnCE
DSO line is too short by 3Tc. The correct timing should be 4Tc+Th-3ns (min) and
5Tc+7ns (max).
3. If the CKP pin is connected to GND and the PLL is disabled and the PSTP bit in
the PLL control register is set and the CKOUT clock output is enabled, then when
recovering from the STOP state, a negative-going spike may occur in the CKOUT
pin.
Workaround: disable CKOUT before entering the STOP state. After exiting the
STOP state, enable CKOUT.
4. If the PLL is enabled and DF>1 and CKOS
≠
CSRC then when enabling or disabling
CKOUT, a spike may occur on CKOUT.
5. If the PLL is enabled and DF>1 and CKOS
≠
CSRC then when entering the STOP
state, a spike may occur on CKOUT.
Applies
to Mask
D41G
D41G
D41G
D41G
D41G
Motorola, Digital Signal Processing Division
6501 William Cannon Drive West, Austin, Texas 78735-8598
pg. 1 /stl/10/30/95
©
1994, Motorola
Chip Errata
DSP56002 Digital Signal Processor
Mask: D41G
Errata Description
6. If CKOUT is enabled when the chip enters the STOP state, CKOUT is held high
instead of being held constant at the same logic level which was true at the mo-
ment the clocks were frozen in the DSP.
7. Disabling CKOUT will set it high immediately even if the CKOUT clock level was
low at this moment, instead of completing the “low” cycle and then be disabled
high.
Applies
to Mask
D41G
D41G
DSP56002 Errata
©
1994, Motorola
pg. 2 /stl/10/30/95
Chip Errata
DSP56002 Digital Signal Processor
Mask: D41G
NOTES
1. An over-bar (i.e. xxxx) indicates an active-low signal.
2. The letters seen to the right of the errata tell which DSP56002 mask numbers apply.
-end-
DSP56002 Errata
©
1994, Motorola
pg. 3 /stl/10/30/95

Plik z chomika:

Inne pliki z tego folderu:

Inne foldery tego chomika:

Zgłoś jeśli naruszono regulamin