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Interface Selection
The ROUTE 56.PCI supports a variety of electrical interfaces. Reference the Control and Status Register
Definitions, found in the Technical Description section of this manual for this bit description. There is line
termination on RXD, RXC, and TXC in the following modes: RS-530, RS-530A, RS-485T, and V.35.
HEX
0
1
2
3
4
5
6,7,8,9
A
B
C
D
E
F
Reset Circuit
The 16C32 can be reset by writing any value to base+3. There is a capacitor that is discharged each time you write to
base+3. It requires multiple writes to get a reset. When you read base+3 bit D4 and it is 0, that means you have
written it enough times. After base+3 bit D4 goes to 0, then you must continue to read it until it goes back to 1.
TSET Clock Select
Port5 of 16C32 is used to select TSET clock source.
0 selects 16C32 TXC as source
1 selects received TXC as source
16C32 Register Access
Pin
Port0
D/C ( data/control )
S/D ( serial/DMA )
DMA channel registers
Serial controller base +
Sealevel Systems ROUTE 56.PCI
M3
M2
M1
M0
0
0
0
0
0
0
0
1
0
0
1
0
0
0
1
1
0
1
0
0
0
1
0
1
0
1
1
0
1
0
1
0
1
0
1
1
1
1
0
0
1
1
0
1
1
1
1
0
1
1
1
1
Source
20 Mhz clock
address SA6
address SA7
base + 0-127
128-255
INTERFACE MODE
all signals are high impedance
* not supported *
RS-232
* not supported *
RS-485T with 120 ohm termination
RS-485 without termination
* not supported *
single ended loop-back
differential loop-back
* not supported *
RS-530
V.35
RS-530A
Technical Description
Page 5
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