7721 datasheet(66/577 Pages) RENESAS

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7721 Datasheet(PDF) 66 Page - Renesas Technology Corp

Part #	7721

Description	16-BIT SINGLE-CHIP MICROCOMPUTER

PDF	577 Pages

Scroll/Zoom	100%

Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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66 / 577 page

7721 Group User’s Manual

RESET

4–3

4.1 Hardware reset

4.1.1 Pin state

______

Table 4.1.1 lists the microcomputer’s pin state while RESET pin is at “L” level. Figure 4.1.2 shows the

________

RESETOUT output retaining timing.

______

Table 4.1.1 Pin state while RESET pin is at “L” level

Pin state

Outputs “H” or “L” level.

Outputs “H” level.

Outputs “L” level.

Outputs

φ1.

Floating.

Pin (Bus, Port) name

____

A0/MA0–A7/MA7, A8/D8–A15/D15, A16/D0–A23/D7, BHE, BLE

R/W, E, ST0, ST1

_________

ALE, RESETOUT

φ1

_____

____

HOLD, RDY, P43–P47, P5–P10

________

Fig. 4.1.2 RESETOUT output retaining timing

RESET

RESETOUT

When RESET pin input level goes from “L” to “H” in this period

3.5 cycles of

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