TMPR3901F

4.2 Read Operation

The TMPR3901F supports two kinds of read operations single read and burst read .

4.2.1Single Read

The single read operation reads four bytes or less data. It is used in the following cases.

On a data cache miss (the data cache is not set for burst read)

An instruction fetch or data load from an uncached area

An instruction fetch when the instruction cache is disabled

A data load when the data cache is disabled

Figure 4-1 shows a timing chart for a single read operation with two wait cycles.

SYSCLK

A[31:2]

BE[3:0]*

RD*

BSTART*

LAST*

ACK*

BUSERR*

D[31:0]

Figure 4-1 Single-read operation (two wait cycles)

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Toshiba TX39 user manual Read Operation, Single Read