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What must be changed to switch from the uPD78F9177 to the uPD78F9177A?

Latest Updated:04/01/2006

Question:

What must be changed to switch from the uPD78F9177 to the uPD78F9177A?

Answer:

(1) Modification for limitations
The following limitation is modified.
- Limitation during input from Port 5

(2) Improvement in operation speed
The maximum operating clock frequency is raised as follows.

uPD78F9177 : 5MHz

uPD78F9177A : 10MHz
uPD78F9177A(A) : 10MHz
(uPD78F9177A(A1) : 5MHz)


(3) Improvement in flash memory reliability
High-reliability versions (A) and (A1) are provided

Suitable Products
UPD7890xx/7891xx