To Next Page

To Previous Page

283 Programmable Hardware Manual (PHM)

lines. Complement it with terminal block Tibbit #20 (nine terminal blocks) or #21

(four terminal blocks) and you have four CPU lines "exposed" and ready to be used.

Note that a CPU I/O line has the voltage swing from 0-3.3V when the line is enabled

(io.enabled= 1- YES). The voltage may be close to 5V when the line is disabled

(io.enabled= 0- NO). This is because the CPU has weak pull-up resistors connected

to 5V.

Combining this Tibbit with #21 is potentially limited in use because #00-1 doesn't

have dedicated ground or power lines, and Tibbit #21 doesn't have them, either.

Need ground (and power)? Consider replacing #21 with #20 (it has ground and

power), or turn to using Tibbit #00-2 (it provides ground) or #00-3 (it provides

ground and power).

LEDs

Four yellow LEDs are connected to four control lines of the CPU (through buffering

gates). LEDs light up for the LOW state of control lines.

7.2.9.2

#00-2, M1S: Three Direct I/O Lines and Ground

Function: Three directly exposed I/O lines of the microcontroller plus the ground

line

Form factor: M1S

Category: Blank module

Special needs: ---

Power requirements: 5V/20mA

Mates with: #19, #20, #21

Tibbo EM1000 User Manual

Questions and Answers: