Digi NS9215 - Manual (Page 353)

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E X T E R N A L D M A
DMA Peripheral Chip Select register
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Register bit
assignment
Bit(s) Access Mnemonic Reset Definition
D31:02 R/W Not used 0 This field must always be set to 0.
D01:00 R/W SEL 0 Chip select
Defines which of the four memory interface chip
select signals (nmpmcstcsout[n]) is connected to
the external peripheral.
00
nmpmcstcsout[0]
01 nmpmcstcsout[1]
10 nmpmcstcsout[2]
11 nmpmcstcsout[3]