6.4 Electrical Characteristics
(1)
•Input (RD)
Mark = (−8 V): Stop bit
Space = (+8 V): Start bit
•Output (TD, DTR)
Mark = (−8 V): For Busy
Space = (+8 V): For Ready
SP232ENC
2: | TD |
20: | DTR |
3: RD | 13 | R1 in | R1 out | 12 |
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25: RESET | 8 | R2 in | R2 out | 9 |
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| 11 | T1 in | T1 out | 14 |
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VCC 104 | 10 | T2 in | T2 out | 7 |
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| 1 | C1+ |
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| 3 | C1− |
| 16 | VCC |
104 | 4 |
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| 5 | C2+ |
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| C2− |
| 104 | ||
| 2 | V+ |
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| 15 |
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| 6 | V− |
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| 104 |
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| GND |
| 104 |
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23: RESET(L) | GND |
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7: GND |
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1: FG | 0 |
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| 0 | |
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(2)TTL circuit Input (RESET)
VCC
3.3k
(HC04 or equivalent)
23 : RESET
Set to LOW when reset.
104
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