M3882 datasheet(45/62 Pages) RENESAS

45 / 62 page

Rev.1.01

Nov 14, 2005

page 45 of 60

REJ03B0089-0101

3882 Group

RESET CIRCUIT

____________

To reset the microcomputer, RESET pin should be held at an “L”

level for 16 XIN cycle or more. (When the power source voltage

should be between 3.3V ± 0.3V and the oscillation should be

____________

stable.) Then the RESET pin set to “H”, the reset state is released.

After the reset is completed, the program starts from the address

contained in address FFFD16 (high-order byte) and address

FFFC16 (low-order byte). Make sure that the reset input voltage is

less than 0.6 V for VCC of 3.0 V.

Fig. 40 Reset sequence

Fig. 39 Reset circuit example

RESET

Internal

reset

Data

Address

SYNC

XIN: 10.5 to 18.5 clock cycles

XIN

FFFC

FFFD

ADH,L

ADL

ADH

1: The frequency relation of f(XIN) and f(

φ) is f(XIN)=8 • f(φ).

2: The question marks (?) indicate an undefined data that depends on the previous state.

Reset address from the vector table.

Notes

(Note)

0.2VCC

Poweron

VCC

RESET

VCC

RESET

Power source

voltage detection

circuit

Power source

voltage

Reset input

voltage

Note : Reset release voltage ; Vcc=3.0 V

M3882 Datasheet(PDF) 45 Page - Renesas Technology Corp

M3882 Datasheet(HTML) 45 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62

Datasheet Download

Link URL