GMS30004 datasheet(18/158 Pages) HYNIX

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Masked options

The GMS300 series offer the following optional features.

These options are masked.

1. Watch dog timer reset by REMOUT output signal.

2. Input terminals having STOP release mode : K0~K3, R0~R3.

3. I/O terminals having pull-up resistor : R0~R3

4. Ceramic oscillation circuit contained (or not contained).

5. Output form at stop mode

D0~D7 :

ÌLÌ or keep before stop mode

STOP Function

Stop mode can be achieved by STOP instructions.

In stop mode :

1. Oscillator is stopped, the operating current is low.

2. Watch dog timer is reset, D8~D9 output and REMOUT output are

ÌLÌ.

3. Part other than WDT, D8~D9 output and REMOUT output have a value before

come into stop mode.

ÌBut, the state of D0~D7 output in stop mode is able to choose as masked

option.

ÌLÌ output or same level before come into stop mode.

The function to release stop mode is able to choose each bit of K or R input.

Stop mode is released when one of K or R input is going to

ÌLÌ.

1. State of D0~D7 output and REMOUT output is return to state of before stop mode

is achieved.

2. After 1024

Ø8 enable clocks for stable oscillating. First instruction start to operate.

3. In return to normal operation, WDT is counted from zero again.

But, at executing stop instruction, if one of K or R input is chosen to

ÌLÌ, stop

instruction is same to NOP instruction.

Chapter 1. Introduction

GMS30004 Datasheet(PDF) 18 Page - Hynix Semiconductor