UPD75212ACW Ver la hoja de datos (PDF) - NEC => Renesas Technology

Número de pieza

componentes Descripción

Fabricante

UPD75212ACW

4-BIT SINGLE-CHIP MICROCOMPUTER

NEC => Renesas Technology 

µPD75212A

* 1. The following external circuit is recommended.

µPD75212A

VDD

VPRE

VLOAD

VSS

+5 V

RD9, 1EL

68 kΩ

RD9, 1EL :Zener Diode (NEC)

Zener Voltage = 8.29 to 9.30 V

–30 V

2. Current to the on-chip pull-down resistor and power-on reset circuit (mask option) is not included.

3. When the processor clock control register (PCC) is set to 0011 and is operated in the high-speed mode.

4. When the PCC register is set to 0000 and is operated in the low-speed mode.

5. When the system clock control register (SCC) is set to 1001 and is operated with the subsystem clock with

main system clock oscillation stopped.

POWER-ON RESET CIRCUIT CHARACTERISTICS (MASK OPTION) (Ta = –40 to +85 °C)

PARAMETER

Power-on reset

operating voltage high

SYMBOL

VDDH

TEST CONDITIONS

MIN. TYP. MAX. UNIT

4.5

6.0

V

Power-on reset

operating voltage low

VDDL

Power supply voltage

rise time

tr

Power supply voltage

off time

Power-on reset circuit*2

current consumption

toff

IDDPR

VDD = 5 V ±10 %

VDD = 2.7 V

* 1. 217/fXX (31.3 ms at fXX = 4.19 MHz)

2. Current with on-chip power-on reset circuit or power-on flag.

0

0.2

V

10

*1

µs

1

s

10

100

µA

2

20

µA

VDD

VDDH

VDDL

Remarks Start the power supply smoothly.

52

toff

tr

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