Silan

Semiconductors

SC3423

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 1.0

2000.12.31

7

m) Memory Minus Key (M-)

i) Subtracts the current display from the contents of memory

ii) It will terminate a number entry.

n) Memory Recall and Clear Key (RCM)

i) First push, as RM key, transfers the contents of the memory register into the display register.

ii) Second push, as CM key, clears the memory.

o) Number, Decimal Key ("O - 9", "

•")

The First number key in a sequence will clear the display and enter the digit in the display. Successive

entries will shift the display left and enters the data in display register. The first decimal point entered is

effective. An attempted entry of more than 8 digits or 7 decimal places will be ignored.

p) Touch Tone (

) Key

i) When power is ON, the touchtone function is enable and the beep sound is generated output during

125ms and

sign is displayed on LCD.

ii) Selection of touchtone function is toggled by touchtone key.

iii) Output waveform.

125ms

3. ERROR CONDITIONS

a). Error Detection

System errors occur when:

i) The integral part of any calculation result exceeds 16 digits.

ii) The integral part of any memory calculation result exceeds 8-digit or when the integral part of any addend

or subtrahend to memory exceeds 8-digit.

iii) The integral part of a mark-up and markdown calculation result exceeds 8-digit.

iv) A division by zero is attempted.

v) An extraction of the square root of a negative number is attempted.

Rough Estimate Calculation results occur when:

The integral part of the result of any one of the standard four functions, percentage, square, reciprocal,

and power calculations exceeds 8-digit and is equal to 16-digit or less.

b). Error Indication

i) System error: "0” is indicated in the first-digit position and "E" in the sign-digit position.

ii) Rough Estimate Calculation result: