UPI-452 Datasheet, PDF (26/53 Pages) Intel Corporation – CHMOS PROGRAMMABLE I/O PROCESSOR

UPI-452
SFR
Accumulator
B Register
FIFO IN
COMMAND IN
FIFO OUT
COMMAND OUT
Serial Data Buffer
Port 0
Port 1
Port 2
Port 3
Port 4
Table 4 DMA Accessible Special Function Registers
Symbol
Address
Source
Only
Destination
Only
A ACC
0E0H
B
0F0H
FIN
0EEH
Y
CIN
0EFH
Y
FOUT
0FEH
Y
COUT
0FFH
Y
SBUF
099H
P0
080H
P1
090H
P2
0A0H
P3
0B0H
P4
0C0H
Either
Y
Y
Y
Y
Y
Y
Y
Y
DMA Special Function Registers
DMA Control SFR DCON0 DCON1
Symbolic
Address
DCON0
DAS IDA SAS
ISA
DM
DCON1
DAS IDA SAS
ISA
DM
(MSB)
Reset Status DCON0 and DCON1 ^e 00H
TM DONE GO
TM DONE GO
(LSB)
Physical
Address
092H
093H
Bit Definition
DAS
IDA
Destination Address Space
0
0
External Data Memory without Auto-Increment
0
1
External Data Memory with Auto-Increment
1
0
Special Function Register
1
1
Internal Data Memory
SAS
ISA
Source Address Space
0
0
External Data Memory without Auto-Increment
0
1
External Data Memory with Auto-Increment
1
0
Special Function Register
1
1
Internal Data Memory
DM
TM
DMA Transfer Mode
0
0
Alternate-Cycle Transfer Mode
0
1
Burst Transfer Mode
1
0
FIFO or Serial Channel Demand Mode
1
1
External Demand Mode
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