TL16PNP200A Datasheet, PDF (8/24 Pages) Texas Instruments – STANDALONE PLUG-AND-PLAY (PnP) CONTROLLER

TL16PNP200A
STANDALONE PLUG-AND-PLAY (PnP) CONTROLLER
SLLS274A– APRIL1997 – REVISED MAY 1997
default format (continued)
The formats for the coded fields are as follows:
Table 2. I/O Block Size
CODE
000
001
010
011
100
101
110
BLOCK SIZE
1 byte
2 bytes
4 bytes
8 bytes
16 bytes
32 bytes
64 bytes
ADDRESS BITS
DECODED
15-0
15-1
15-2
15-3
15-4
15-5
15-6
Table 3. OEN0 Configuration - Mode 0
CODE
000
001
010
LOGICAL DEVICE
LD0
LD1
LD0 or LD1
Table 4. OEN0 and OEN1 Configuration - Mode 1
CODE
000
001
010
011
100
LOGICAL DEVICE
LD0
LD1
LD2
LD3
LD4
The IRQ level field is the IRQ level number (for example 0011 for IRQ3, 0100 for IRQ4, etc.), and the DMA
channel field is the DMA channel number (for example 000 for DMA channel 0, 001 for DMA channel 1, etc.).
The LDn Active bits must be set to 1 when device n is required to be active on power up or after reset, otherwise
it is cleared to 0. The mode bit must be 0 for mode 0 operation and 1 for mode 1 operation.
The DMA mapping fields tell the TL16PNP200A which ISA DMA channels are connected to the device. For
example, in Mode 0 any three ISA DMA channels can be connected to the device. When DMA channels 0, 3,
and 5 are connected to CDRQ0/CDACK0, CDRQ1/CDACK1, and CDRQ2/CDACK2, respectively, then DMA
0 mapping field will be 000, DMA 1 mapping field will be 011, and DMA 2 mapping field will be 101.
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