Renesas 4513 Informações Técnicas descarregar pdf (Página 59)

4513/4514 Group

SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

MITSUBISHI MICROCOMPUTERS

Clock signal f(XIN) is obtained by externally connecting a ceramic

resonator.

Connect this external circuit to pins XIN and XOUT at the shortest

distance. A feedback resistor is built in between pins XIN and XOUT.

When an external clock signal is input, connect the clock source to

IN and leave XOUT open. When using an external clock, the maxi-

mum value of external clock oscillating frequency is shown in Table

24.

Table 24 Maximum value of external clock oscillation frequency

Supply voltage

VDD = 2.0 V to 5.5 V

VDD = 4.0 V to 5.5 V

VDD = 2.5 V to 5.5 V

VDD = 2.0 V to 5.5 V

VDD = 2.5 V to 5.5 V

VDD = 4.0 V to 5.5 V

VDD = 2.5 V to 5.5 V

Oscillation frequency (duty ratio)

3.0 MHz (40 % to 60 %)

1.0 MHz (40 % to 60 %)

0.8 MHz (40 % to 60 %)

3.0 MHz (40 % to 60 %)

1.0 MHz (40 % to 60 %)

ROM ORDERING METHOD

1.Mask ROM Order Confirmation Form

✽

2.Mark Specification Form

✽

3.Data to be written to ROM, in EPROM form (three identical cop-

ies) or one floppy disk.

✽For the mask ROM confirmation and the mark specifications, re-

fer to the “Mitsubishi MCU Technical Information” Homepage

(http://www.infomicom.maec.co.jp/indexe.htm).

Fig. 42 Ceramic resonator external circuit

Fig. 43 External clock input circuit

Note: Externally connect a

damping resistor Rd de-

pending on the oscillation

frequency.

(A feedback resistor is

built-in.)

Use the resonator manu-

facturer’s recommended

value because constants

such as capacitance de-

pend on the resonator.

Mask ROM version

One Time PROM version

Middle-speed mode

High-speed mode

Middle-speed mode

High-speed mode

4513/4514

OUT

4513/4514

XIN XOUT

External oscillation circuit

VDD

VSS

1 2 ... 54 55 56 57 58 59 60 61 62 63 64 ... 98 99

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