User`s manual

PK2100
Appendix B: Specifications s B-5
Table B-3. PK2100 Jumper Connections
Header Pins Description
1-2 Connect if using 32K RAM or 128K RAM.
2-3 Connect for 256K or 512K RAM.
4-5 Connect if using 32K, 64K, or 128K EPROM.
5-6 Connect for 512K or 256K EPROM or flash EPROM.
7-8 Connect for other than 32K EPROM.
8-9 Connect for 32K EPROM.
10, 11 Not connected.
12-13 Connect for 64K, 128K, 256K flash EPROM.
J1
13-14 Connect for 512K (non-flash) EPROM.
1-2
Write-protect EEPROM at addresses 256–511.
This is the factory setting.
J3
2-3 Write-enable EEPROM at addresses 256–511.
1-2 Not connected.
3-4
Connects timer output T0 to processor /INT2. Can
generate periodic interrupts.
5-6
Connects universal input 1 to processor /INT0. Not
recommended.
7-8
Connect processor I/O CKA1 to digital input 6. Can
be used to aid pulse measurements.
9-10
Connect processor I/O CKA1 to digital input 7. Can
be used to aid pulse measurements.
11-12
Processor-readable jumper. By convention, install
whenever 13-14 is installed.
J8
13-14 Install jumper to enable watchdog timer.
1-2
The comparators used for the universal inputs are
connected to the voltage divider RR, which has a
value of 1.6 V. This causes the universal inputs to
have a threshold fixed at this value.
J9
2-3
Factory setting. The internal DAC is connected to the
comparators used for the universal inputs.
1-2
Connect to enable the CTS function on RS-232 serial
port.
J11
2-3
Connect to use the CTS line as a board reset line. High
CTS will reset board.