4502 datasheet(173/214 Pages) RENESAS

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3.1 Electrical characteristics

3-3

4502 Group

APPENDIX

Rev.2.01

Feb 02, 2005

REJ09B0193-0201

3.1.2 Recommended operating conditions

Table 3.1.2 Recommended operating conditions 1

(Ta = –20 °C to 85 °C, VDD = 2.7 to 5.5 V, unless otherwise noted)

Symbol

VDD

VRAM

VSS

VIH

VIL

IOL(peak)

IOL(avg)

ΣIOL(avg)

Parameter

Supply voltage

RAM back-up voltage

Supply voltage

“H” level input voltage

“L” level input voltage

“L” level peak output current

“L” level average output current

“L” level total average current

Notes 1: System is in the reset state when the value is the detection voltage of the voltage drop detection circuit or less.

2: The voltage drop detection circuit is operating in the RAM back-up with the POF instruction (system enters into the reset state when the value is

VRST or less). In the RAM back-up mode with the POF2 instruction, the voltage drop detection circuit stops.

3: The average output current (IOH, IOL) is the average value during 100 ms.

Unit

Conditions

High-speed mode

Middle-speed mode

Low-speed mode

Default mode

(at RAM back-up mode with the POF2

instruction)

P0, P1, P2, P3, D2, D3, XIN

D0, D1, D4, D5

RESET

C, K

CNTR, INT

P0, P1, P2, P3, D0–D5, XIN

C, K

RESET

CNTR, INT

P2, P3, RESET

D0, D1

D2/C, D3/K, D4, D5

P0, P1

P2, P3, RESET (Note 3)

D0, D1 (Note 3)

D2/C, D3/K, D4, D5 (Note 3)

P0, P1 (Note 3)

P2, D, RESET

P0, P1, P3

Max.

5.5

VDD

0.2VDD

0.16VDD

0.3VDD

0.15VDD

5.0

Limits

Min.

2.7

(Note 1)

1.8 (Note 2)

0.8VDD

0.85VDD

0.5VDD

0.7VDD

0.85VDD

Typ.

f(XIN)

≤ 4.4 MHz

VDD = 4.0 to 5.5 V

VDD = 2.7 to 5.5 V

VDD = 5.0 V

4.4

f [MHz]

Ceramic resonator and high-speed mode selected

External clock input (ceramic resonator selected)

Recommended operating

condition

4.2

2.7

5.5

VDD[V]

VRST

(Note)

3.2

4.2

2.7

5.5

VDD[V]

VRST

(Note)

Recommended operating

condition

It shows the electrical characteristics range of detected voltage

for voltage drop detection circuit.

System reset occurs when the supply voltage is under

the detected voltage for voltage drop detection circuit.

Note:

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