LC66P408 View Datasheet(PDF) - SANYO -> Panasonic

Part Name

Description

Manufacturer

LC66P408

4-bit Microcontroller with Built-in PROM

SANYO -> Panasonic 

LC66P408

APPLICATION NOTES

Reset Timing

The reset signal on RES should be held LOW for a mini-

mum of three instruction cycles after the oscillator has

stabilized to ensure correct operation, as shown in the

following figure.

After a reset occurs, all I/O ports are reset to open-drain

output configuration with floating outputs, except for ports

P0 and P1 which both have an output level after reset

option. The output configuration of each port is then set

using the specified options during the eight instruction

cycles after RES goes HIGH. Program execution then

begins from address 0000H.

The LC66E408/P408 can also be reset while in hold mode

(HOLD/P33 is LOW) as long as hold mode is exited be-

fore RES goes HIGH again.

Reference Clock

The external circuit for a ceramic resonator is shown in

figure 6, and the recommended resonator and component

values, in the following table. The oscillator stabiliza-

tion characteristics are shown in figure 7.

Figure 6. Ceramic resonator

No.3492–11/14

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