32186 datasheet(200/1032 Pages) RENESAS

200 / 1032 page

RESET

7-2

32185/32186 Group Hardware Manual

Rev.1.10 REJ09B0235-0110 May 15, 07

7.1 Outline of Reset

The microcomputer is reset by applying "L" level signal to the RESET# input pin. The microcomputer is

gotten out of a reset state by releasing the RESET# input back "H," upon which the reset vector entry ad-

dress is set in the Program Counter (PC) and the CPU starts executing from the reset vector entry.

7.2 Reset Operation

When "L" level signal in width of more than 300 ns is applied to the RESET# pin, the microcomputer enters

a reset state. At this time, the internal circuits (including the CPU) are reset. (For details about the pin state

when reset, see Table 1.4.1, “Pin Assignments of the 32185/32186 Group”)

When the RESET# input is returned "H," the internal circuits get out of a reset state (2333 to 2334 BCLK)

periods after that.

7.1 Outline of Reset

Noise Canceller

OVF

Pin reset signal

Internal circuit reset signal

Flip-flop

Counter

RESET#

Extended for a duration during which

the RESET# input is held "L"

2333 to 2334BCLK

RESET# pin

Reset signal (internal signal)

past the noise canceller

Internal circuit reset signal

(internal signal)

Duration needed for

noise cancellation(50 to 300ns)

Figure 7.2.2 Reset Sequence

Figure 7.2.1 Reset Circuit

32186 Datasheet(PDF) 200 Page - Renesas Technology Corp