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INTEL 186 EB/EC EVALUATION BOARD USER’S MANUAL
3-12
3.7 EXPANSION INTERFACE
There are two expansion connectors on the evaluation board. Refer to the schematics included on
a floppy diskette in your kit for representation of the connector pinouts. The 60-pin JP1 connector
(Figure 3-7) provides latched address pins and the address/data bus signals. This connector also
provides access to all bus-control signals, programmable chip-selects, +3.3 volts, +5 volts, and
+12 volts. The JP2 connector provides access to on-chip peripherals of the 80x186 processor.
This connector allows access to interrupt inputs, timer inputs and outputs, port pins, CLKOUT,
RESOUT, +3.3 volts, +5 volts, and +12 volts. The JP2 connector contains 40 pins for the EC
processors (see Figure 3-6) and 24 pins for the EB processors (see Figure 3-7).
NOTE
3.3 volts is available on the connector only when jumper E1 selects V
CC
= 3.3
volts; otherwise, these pins are 5 volts. +12 volts is available on the connector
only when Port Pin 1.1 is programmed to a logic 0; otherwise, these pins are
V
CC
minus a diode drop.
Figure 3-6. 186 EC Peripheral Expansion Connector JP2 (40 pin)
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
2 - T1OUT
4 - T0OUT
6 - V
CC
8 - P3.0
10 - P3.1
12 - P3.2
14 - P3.3
16 - P3.4
18 - P3.5
20 - WDTOUT#
22 - V
SS
24 - BCLK0
26 - P2.3
28 - RXD1
30 - TXD1
32 - P2.6
34 - CTS1#
36 - V
SS
38 - +5VDC
40 - +12VDC
V
SS
..............................
T1IN.............................
V
CC
..............................
INT0.............................
INT1.............................
INT2.............................
INT3.............................
INT4.............................
INT5.............................
INT6.............................
INT7.............................
INTA#...........................
V
SS
...............................
DRQ0...........................
DRQ1...........................
DRQ2...........................
DRQ3...........................
V
SS
...............................
GCS6#..........................
GCS7#..........................