4524 datasheet(63/161 Pages) RENESAS

63 / 161 page

Rev.2.00

Jul 27, 2004

page 63 of 159

REJ03B0091-0200Z

4524 Group

Fig. 49 Structure of reset pin and its peripherals,, and power-on reset operation

Name

D0–D3

D4/SIN, D5/SOUT, D6/SCK

D7/CNTR0

D8/INT0, D9/INT1

P00–P03

P10–P13

P20/AIN0–P23/AIN3

P30/AIN4–P33/AIN7

P40–P43

C/CNTR1

Notes 1: Output latch is set to “1.”

2: Output structure is N-channel open-drain.

3: Pull-up transistor is turned OFF.

Function

D0–D3

D4–D6

D8, D9

P00–P03

P10–P13

P20–P23

P30–P33

P40–P43

State

High-impedance (Notes 1, 2)

High-impedance (Note 1)

High-impedance (Notes 1, 2, 3)

High-impedance (Note 1)

High-impedance (Notes 1, 2)

“L” (VSS) level

(1) Power-on reset

Reset can be automatically performed at power on (power-on re-

set) by the built-in power-on reset circuit. When the built-in

power-on reset circuit is used, the time for the supply voltage to

rise from 0 V must be set to 100

µs or less. If the rising time ex-

ceeds 100

µs, connect a capacitor between the RESET pin and

VSS at the shortest distance, and input “L” level to RESET pin until

the value of supply voltage reaches the minimum operating volt-

age.

Table 19 Port state at reset

RESET pin

WEF

Watchdog reset signal

(Note 1)

Pull-up transistor

(Note 1)

Power-on reset circuit

Voltage drop detection circuit

VDD (Note 3)

100

µs or less

(Note 2)

Internal reset signal

Power-on

Reset released

Internal reset signal

Reset

state

Notes 1:

This symbol represents a parasitic diode.

2: Applied potential to RESET pin must be VDD or less.

3: Keep the value of supply voltage to the minimum value

or more of the recommended operating conditions.

Power-on reset circuit output

4524 Datasheet(PDF) 63 Page - Renesas Technology Corp

4524 Datasheet(HTML) 63 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 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL