Quatech MPA-200/300, RS-422/485 IRQ10 IRQ11 IRQ12 IRQ14 IRQ15, J10 Transmit DMA Channel Selection

IRQ10	1&6
IRQ11	2&7
IRQ12	3&8
IRQ14	4&9
IRQ15	5&10

4.3J10 - Transmit DMA Channel Selection

J10 selects the DMA channel to be used for transmit DMA. Three channels (1 - 3) are available on the MPA-200 for DMA. When selecting a DMA channel, both the DMA acknowledge (DACK) and the DMA request (DRQ) for the appropriate channel need to be selected. Table 8 summarizes the jumper block selections for J10

Table 8 Jumper block J10 selections.

DMA Channel	Pins
Channel 1	1&7
	2&8
Channel 2	3&9
	4&10
Channel 3	5&11
	6&12

Quatech Inc., MPA-200/300 Manual 12