W77C32F-40 Nuvoton Technology Corporation of America, W77C32F-40 Datasheet - Page 67

• Manufacturer Part Number: W77C32F-40
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W77C32F-40

• Lead Free Status / Rohs Status: Supplier Unconfirmed

Example 4: Invalid Access
In the first two examples, the writing to the protected bits is done before the 3 machine cycle window
closes. In Example 3, however, the writing to the protected bit occurs after the window has closed,
and so there is effectively no change in the status of the protected bit. In Example 4, the second write
to TA occurs 4 machine cycles after the first write, therefore the timed access window in not opened at
all, and the write to the protected bit fails.
MOV TA, #0AAh 3 M/C
NOP
MOV TA, #055h
SETB EWT
1 M/C
3 M/C
2 M/C
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Publication Release Date: December 20, 2005
W77C32/W77C032
Revision A5