Sharp ER-A330 Manuel d'utilisateur télécharger pdf (Page 19)

6) Test No. 6: RAM test

1 Key operation

2 Test content

The RAM of 256KByte (standard provision) is checked.

Read and write of each data are made to the addresses shown in the

table below to compare the data. If there is no error, the machine

returns to the key wait state. If an error occurs, intermittent buzzer

sounds are made and the error print is made. Press any key to cancel

the error.

X AD

Upper AD

0123456789ABCDEF

000X 0F 1E 2D 3C 4B 5A 69 78 87 96 A5 B4 C3 D2 E1 F0

001X F0 0F 1E 2D 3C 4B 5A 69 78 87 96 A5 B4 C3 D2 E1

002X E1 F0 0F 1E 2D 3C 4B 5A 69 78 87 96 A5 B4 C3 D2

004X D2 E1 F0 0F 1E 2D 3C 4B 5A 69 78 87 96 A5 B4 C3

008X C3 D2 E1 F0 0F 1E 2D 3C 4B 5A 69 78 87 96 A5 B4

010X B4 C3 D2 E1 F0 0F 1E 2D 3C 4B 5A 69 78 87 96 A5

020X A5 B4 C3 D2 E1 F0 0F 1E 2D 3C 4B 5A 69 78 87 96

040X 96 A5 B4 C3 D2 E1 F0 0F 1E 2D 3C 4B 5A 69 78 87

080X 87 96 A5 B4 C3 D2 E1 F0 0F 1E 2D 3C 4B 5A 69 78

100X 78 87 96 A5 B4 C3 D2 E1 F0 0F 1E 2D 3C 4B 5A 69

200X 69 78 87 96 A5 B4 C3 D2 E1 F0 0F 1E 2D 3C 4B 5A

400X 5A 69 78 87 96 A5 B4 C3 D2 E1 F0 0F 1E 2D 3C 4B

800X 4B 5A 69 78 87 96 A5 B4 C3 D2 E1 F0 0F 1E 2D 3C

3 Check item

Check the end print.

4 Test end

Normal end print ******* 0 6

Error print ******** 6

7) Test No. 7: Battery voltage test

1 Key operation

2 Details of test

By the above key operations, the battery voltage is checked with

the A/D conversion circuit of CPU and the following display is

made.

***

Voltage conversion value when the reference voltage Vref (+5V) is

supposed to 256.

3 Check item

Display check item

(Example) If the battery voltage is +3 V, 256 × 3/5 = 153 is

displayed.

4 Test end

Pressing any key will make the following print and terminate the

test.

End print 07

(Note) Specified value: 3.0 V

– 18 –

1 2 ... 14 15 16 17 18 19 20 21 22 23 24 ... 38 39

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Sharp ER-A330 Manuel d'utilisateur Page 19

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