W90221X Winbond Electronics Corp America, W90221X Datasheet - Page 124

• Manufacturer Part Number: W90221X
• Description: Pa-risc Embedded Controller
• Manufacturer: Winbond Electronics Corp America

Channel 0 Mode Control Register (MOD0)
Port address: 0xf000020c
Bit 0
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bits 7-8
W90221X version 0.6
IOtype[1]
DMAen
16
24
00
01
0
8
0
1
0
1
0
1
0
1
Reserved
17
25
1
9
TRtype[0:1]
DMA enable
Reserved
Terminal count interrupt enable
Disable
Enable (once this bit is set and TC is asserted, the DMAC will
generate external interrupt to host)
Enable ECP as DMA device
Disable
Enable
Terminal count flag
TC = 1 (asserted) indicates the length counter reaching 0
Memory-to-memory transfer mode
Disable
Enable
Demand mode or block mode select (this bit is valid only in the
transfer between memory and I/O)
The DMA transfer between memory and I/O is in block mode
The DMA transfer between memory and I/O is in demand mode
DMA I/O device type (only 8-bit external I/O devices is supported)
8-bit type, length counter counts by byte
16-bit type, length counter counts by half-word
Wstate
TCIen
10
18
26
2
Access type: read/write
ECPen
11
19
27
3
Tout[1:8]
TC
12
20
28
4
IOrec
M2M
FIX
13
21
29
5
Reserved
DEM
14
22
30
6
Default: 0x0
IOtype[0]
Tout[0]
15
23
31
7
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