Toshiba TECRA S1 Manual Do Utilizador

This test item is to check whether there is open or short circuit issue in the external 
pins by looping back the external pins, controlling the voltage of each data pin, 
control pin and status pin. 

The test requires an external connector to insert into the tested LPT port. Below is the 
connector's description. 

Fixture Description: 

 

 

Note:  (1)~(17) -------- Pin number 

PD0~ PD7--------Data Line  

 Status Line --------  –ERROR(S3), +SELECT(S4), –ACK(S6), +PE(S5), +BUSY(S7) 

Control Line--------  –AUTFD(C1), –PINIT(C2), -STROBE(C0), –SLIN(C3) 

1. Register Check 

Check whether the data register and control register works normally. 

2. IRQ Check 

Check whether LPT interrupt works normally. 

3.  External Loop back 

Check whether there is open or short circuit issue. 

4. ECP Mode 

(9) + PD7 

(15) -ERROR 

(5) + PD3 

(1)  - STROBE 

(10)  - ACK 

(8) + PD6 

(14) -AUTFD 

(7) + PD5 

(13)

(6) + PD4 

(16) -PINIT 

(2) +PD0 

(11)+ BUSY 

(3) + PD1 

(17)  - SLIN 

(4) + PD2 

(12) + PE