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3.3 User System Interface Circuit

3.3.1 User System Interface Circuit

The circuits that interface the MCU in the emulator to the user system include buffers and resistors. When

connecting the emulator to a user system, adjust the user system hardware compensating for FANIN, FANOUT,

and propagation delays.

The AC timing values when using the emulator are shown in table 3.2.

Note: The values with the emulator connected, in table 3.2, are measurements for reference and are not

guaranteed values.

Table 3.2 Bus Timing when Using the Emulator (Bus Clock: 50.0 MHz)

MCU Specifications (ns) Values with Emulator Connected (ns)

Item Min Max Min Max

tRDS 15 ⎯ 16 ⎯

tACC tcyc x (n + 2) – 35

(n is the number of

waits)

⎯ tcyc x (n + 2) – 37

(n is the number of

waits)

⎯

The basic bus cycle (software wait) is shown in figure 3.2. The user system interface circuits connected to the

user system are shown in figures 3.3 to 3.8.

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Renesas User System Interface Board HS7047ECH61H Manuale Utente Pagina 39