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ST10R272L-B0 데이터시트(PDF) 3 Page - STMicroelectronics

부품명 ST10R272L-B0
상세설명  16-BIT ROMLESS LOW VOLTAGE MCU WITH MAC
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제조업체  STMICROELECTRONICS [STMicroelectronics]
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ST10R272L-B0 Errata Sheet
3/4
2.4 CORE.4: INCORRECT INSTRUCTION FETCH ON JUMP TO ITSELF
The bug happens In the following program sequence:
...
...
Label_A: JMPR cc_XX, Label_A
Word Intruction 1;
Word Intruction 2
Word Intruction 3
...
...
...
In the following conditions:
- code is fetched from External Memory,
- the loop JMPR cc_XX, Label_A is being executed,
- a PEC transfer with PSW as destination triggers a change of the condition cc_XX and so, the loop
is finished,
the Word Intruction1 is
never executed.
Workaround: If JMPA is used instead of JMPR, the bug does not occur.
2.5 EBC.3: VISIBLE MODE
When visible mode is enabled (syscon.1 = 1), data of a read access to an XBUS peripheral
is not driven to the external bus (Port 0). Instead, Port 0 is tri-stated during these read
accesses.
If all external devices are configured in 8-bit demultiplexed mode, an XBUS-peripheral write can cause
a conflict on P0H (Port 0 [8:15])
.
2.6 EBC.4: XPERS ACCESS IN XPERSHARE/EMULATION MODE
In emulation mode and if the Startup Configuration 8-bit multiplexed mode is selected, P0H
(Port 0 [8:15]) is always an output and write accesses to XPERs cannot be done as these
would cause a conflict.
Workaround: Use a Startup Configuration other than 8-bit multiplexed mode.
If HOLD mode is entered (P6.5 = 0) following an 8-bit multiplexed mode access and if
Xpershare is enabled, Xper accesses will cause a conflict on the internal XBUS xb_data
[15:7] bus.
Workaround: None.


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