User manual

Page 37

Document No. 80-15151 Issue 6 HEBER LTD

8.20 P15 – Memory Expansion Card Connector

Reference:

P15

Type:

DIN41612, C/2 Socket Vertical

Description:

Connector for Memory Expansion Boards

abc

A4 A5 A6

2 VCC A7 A8

3 VCC A9 A10

4 A3 A11 A12

5 A2 A13 A14

6 A1 A15 A16

7 GND A17 A18

8 GND A19 A20*

9 FPGA0 A21 D15

10 FPGA1 D14 D13

11 FPGA2 D12 D11

12 FPGA3 D10 D9

13 FPGA4 D8 D7

14 FPGA5 D6 D5

15 FPGA6 D1 D3

16 D0 D2 D4

* NB. - Pin c8, “A20” is in fact the connection to Pin 1 (ROM_P1) of the 2 on-board EPROMs, U1 &

U2, and is driven by the FPGA.

For all memory accesses, excluding those to the ROM/EPROM area mapped by CS0-, the FPGA

routes A20 to this pin.

For all memory accesses to the ROM/EPROM area mapped by CS0-, the FPGA routes either Vcc,

A19 or A20 to this pin, depending on the memory mode set in the FPGA.

See Section 5.6, “EPROM Sockets / EPROM Autoselect Feature” for details of operation.

8.21 P16 – Background Debug Mode Connector

Reference:

P16

Type:

10W Low Profile Header

Description:

Background Debug Mode Connector

Only fitted to Software Development Boards

DS-

1 2 BERR-

GND 3 4BKPT

GND 5 6 FREEZE

RESET- 7 8IFETCH

VCC 9 10 IPIPE