INSTALLATIONS
CN1: PS/2 Keyboard and PS/2 Mouse Connectors
PS/2 Mouse
PS/2 Keyboard
| Keyboard | Mouse | Signal Name |
Signal Name |
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Keyboard data | 1 | 1 | Mouse data |
N.C. | 2 | 2 | N.C. |
GND | 3 | 3 | GND |
5V | 4 | 4 | 5V |
Keyboard clock | 5 | 5 | Mouse clock |
N.C. | 6 | 6 | N.C. |
CN2: 4-port USB Connector
CN2 is a USB connector consisting of four ports stacked vertically.
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| 1 |
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| Ground |
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| 2 |
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| USB+ |
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| CN2 |
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| USB- |
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| Vcc |
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CN3, J3: Serial Ports
CN3 (COM1) is a
COM1 |
| COM2 |
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Signal Name | Pin # | Pin # | Signal Name |
DCD, Data carrier detect | 1 | 6 | DSR, Data set ready |
RXD, Receive data | 2 | 7 | RTS, Request to send |
TXD, Transmit data | 3 | 8 | CTS, Clear to send |
DTR, Data terminal ready | 4 | 9 | RI, Ring indicator |
GND, ground | 5 | 10 | Not Used |
14 | MB820 User’s Manual |