Freescale Semiconductor, Inc.
ARCHIVED BY FREESCALE SEMICONDUCTOR, INC. 2005
Freescale Semiconductor, Inc.
Hardware Description and Board Operation
3.7 UART AND IRDA
ARCHIVED BY FREESCALE SEMICONDUCTOR, INC. 2005
MC68VZ328 |
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| RS232 Transceiver | VCC |
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| P9 |
TXD |
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RXD |
| UART |
RTS |
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CTS | EN |
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| VCC | |
| Buffer | IRDA |
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| GND |
| EN |
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PD4 | EN |
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Figure 3-5. UART and IRDA Interface.
Figure 3-5 shows the UART and IRDA module. The M68EZ328ADS v2.0 has one RS232 serial ports P9. P9 is using the UART of MC68EZ328. It is 9-pin female D-Type connectors containing the signals as shown in Figure 3-6. The transceivers for UART can be enabled by turning the DIP switch S1-1 on.
NC | 1 | 6 |
| NC | |
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TXD | 2 |
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7 |
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RXD | 3 |
| CTS |
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8 |
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NC | 4 |
| RTS | ||
9 |
| NC | |||
GND | 5 |
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Figure 3-6. Serial Port Pin Assignment
The IrDA transceiver is provided and connected to DragonBall’s UART Port only with a buffer in between for controlling its ON/OFF. If IrDA is being used,
MOTOROLAM68EZ328ADS v2.0 USER’S MANUAL3-22
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