Chapter 4 Control Memory; The Μ Pd98409 Has An On-Chip Control Memory, But Is It Possible To Connect Additional Memories Such As Sram Externally; How Long Does It Take For The Control Memory To Be Automatically Initialized After Reset; Are The Contents Of The Control Memory Cleared To 0 When The Control Memory Is Automatically Initialized After Reset - NEC mPD98409 Q&A

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Q.4.1

The µ PD98409 has an on-chip control memory, but is it possible to connect additional memories such as SRAM

externally?

A.4.1

SRAM cannot be additionally connected. The µ PD98409 supports 64 VCs (as the on-chip control memory) for

transmission/reception.

Reference: µ PD98409 User's Manual 5.2 Setting of Control Memory

Q.4.2

A.4.2

It takes about 1024 clocks (BUSCLK input).

Reference: µ PD98409 User's Manual 5.1 (2) Initializing control memory

Q.4.3

Are the contents of the control memory cleared to 0 when the control memory is automatically initialized after

reset?

A.4.3

When the control memory of the µ PD98409 is automatically initialized, the entire control memory is cleared to 0,

after which block numbers are written.

Reference: µ PD98409 User's Manual 5.1 (2) Initializing control memory

CHAPTER 4 CONTROL MEMORY

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