ia186em Innovasic Semiconductor Inc., ia186em Datasheet - Page 65
ia186em
Manufacturer Part Number
ia186em
Description
8-bit/16-bit Microcontrollers
Manufacturer
Innovasic Semiconductor Inc.
Datasheet
1.IA186EM.pdf
(145 pages)
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IA186EM/IA188EM
8-Bit/16-Bit Microcontrollers
initialized. Each address may be incremented or decremented independently of each other after
each transfer. The addresses are incremented or decremented by two for word transfers and
incremented or decremented by one for byte transfers. They are undefined at reset (see
Table 26).
Table 26. DMA Destination Address High Register
5.1.11 DIDSTL (0d4h) and D0DSTL (0c4h)
DMA DeSTination Address Low Register. The 16 bits of these registers are combined with the
4 bits of the respective DMA Destination Address High Register to produce a 20-bit destination
address. They are undefined at reset (see Table 27).
Table 27. DMA Destination Address Low Register
5.1.12 D1SRCH (0d2h) and D0SRCH (0c2h)
DMA SouRCe Address High Register. The 20-bit source address consists of these 4 bits
combined with the 16 bits of the respective Source Address Low Register. A DMA transfer
requires that two complete 16-bit registers in the PCB (high and low registers) be used for both
the source and destination addresses of each DMA channel involved. Each channel requires that
all four address registers be initialized. Each address may be independently incremented or
decremented after each word transfer by 2 or by 1 for byte transfers. They are undefined at reset
(see Table 28).
Table 28. DMA Source Address High Register
15
15
15
14
14
14
Bits [15–4]—Reserved.
Bits [3–0]—DDA19–DDA16 → DMA Destination Address High bits are driven onto
a19–a16 during the write phase of a DMA transfer.
Bits [15–0]—DDA15–DDA0 → DMA Destination Address Low bits are driven onto
a15–a0 during the write phase of a DMA transfer.
13
13
13
12
12
12
11
11
11
Reserved
Reserved
®
10
10
10
DDA15–DDA0
9
9
9
8
8
8
7
7
7
UNCONTROLLED WHEN PRINTED OR COPIED
6
6
6
5
5
5
Page 65 of 145
IA211050831-16
4
4
4
DDA19–DDA16
3
DSA19–DSA16
3
3
2
2
2
1
1
1
0
0
0
December 24, 2008
http://www.Innovasic.com
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Data Sheet
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