If you are doing a conversion form Zworlds little giant BL1100, start by understanding what the jumpers are and how they are connected to your application. Your new design will be dependent on the settings and will likely only need a fraction of the capability of this BL1100 board. We have seen some applications that use most of its functionality, but it is usually just a couple of IO ports and and communications ports…
Table B-4. Standard BL1100 Jumper Settings
Header Pins Description Factory
Default
J12
1–2
Connect for factory-default RS-232 or RS-485
programming mode, remove for run mode or
user-defined programming mode
Connected
6–10
CTC3 output drives CTC2
8–9
CTC2 output drives CTC3
6–11
CTC2 operates at 16X baud rate of z0
6–12
CTC2 operates at 16X baud rate of z1
8–11
CTC3 operates at 16X baud rate of z0
8–12
CTC3 operates at 16X baud rate of z1
9–11
CTC2 drives external clock at 1/16 z0 baud
rate
10–12
CTC3 drives external clock at 1/16 z1 baud
rate
1–2
J13
J14
J014
J15
J16
J17
SIO Port A to RS-232 (J8)
Connected
2–3
SIO Port A to RS-485 (J3)
3–4
ZIO Port 1 to RS-485 (J3)
1–4
ZIO Port 1 to RS-232 (J8)
1–2
SIO Port A to RS-485 (J3)
2–3
ZIO Port 1 to RS-485 (J3)
Connected
1–2
RX and TX clocks come from SIO
Connected
2–4
TX clock from SIO, RX clock from external
source via pins 3–4 of header J3/J301
1–2
SRAM smaller than 256K
2–3
SRAM 256K or larger
1–2
EPROM 32 K
2–4
EPROM larger than 32K
1–2
Connect to enable excitation resistors for
analog input signal conditioning op-amps
Connected
Connected
Connected
Not
connected
continued…
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Table B-4. Standard BL1100 Jumper Settings (concluded)
Header
Pins
1–2
J18
Factory
Default
Description
RS-485 three-state always enabled
Connected
2–3
RS-485 three-state controlled by PB0
none
RS-485 three-state always disabled
1–2
Connect to enable onboard +5 V power
supply, disconnect for external power supply
Connected
1–2
EPROM smaller than 256K
Connected
2–4
EPROM 256K
1–2
Write-protect upper part of EEPROM
2–3
Write-enable upper part of EEPROM
J22
1–2
Connect to enable watchdog timer
Not
connected
J25
1–2
Startup mode factory-default RS-232 or read
from EEPROM
Connected
1–2
Remote reset using RXC
2–3
Remote reset using CTSB
none
No remote reset
1–2
Connect to enable switching power supply,
disconnect for time/date clock to control
power supply
1–2
Output DAC to pin 1 on J5/J501
2–3
Pin 1 of J5/J501 is analog ground
1–2
Connects E to expansion bus J24 pin 52
2–3
Connects BATACT to expansion bus J24 pin
52
J31
1–2
Ties high-voltage driver SUB signal to ground
to keep it from floating
Connected
J32
1–2
Connect to control use of ENMI signal on
expansion bus J24 pin 9
Connected
J19
J20
J21
J26
J27
J28
J29
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Connected
Not
installed
Connected
Connected
Not
installed