SyncMOS Technologies Inc.

SM89S16R1

8-Bits Micro-controller

With 64KB Flash ROM & IKB RAM & RTC & ADC & PWM & PDWU embedded

Specifications subject to change without notice contact your sales representatives for the most recent information.

SM89S16R1 V1.0 JANUARY 2005

11

Figure 4 External Clock Drive waveform

Figure 5 AC Testing Input/Output

Figure 6 AC Testing, Floating Waveform

ALE

/PSEN

PORT0

PORT2

A0-A7

INSTR IN

A0-A7

A8-A15

A8-A15

A8-A15

A8-A15

Figure 7 External Program Memory Read Cycle

Floating

2.0V

0.8V

0.8V

2.0V

Notes:

The float state is define as the point which PORT 0

pins sinks 3.2mA or source 400

µA at the voltage

test level.

Test Points

2.0V

0.8V

0.8V

2.0V

Notes:

AC inputs during testing are driven at 2.4V for logic

“HIGH” and 0.45V for logic “LOW”. Timing

measurements are at 2.0V for logic “HIGH” and 0.8V

0.8V