Data Sheet

iolinker Family Data Sheet

Address Function

0x7f Status register

Table 6: Register addresses

4.7.4 REA – Read pin states

Function Read the state of pin range x to y

Command byte 0xC7

Argument list First pin address to read, last pin address to read

Reply argument list Current pin states

Example arguments 0x01 0x00 | 0x7f 0x00 (Read pins P1 to P127 )

To read pin states, use the ﬁrst and the last pin address as parameters.

If the last pin number equals 0, only one pin state will be read. For pins that are not set

as input pin, the state will always be returned as low.

The current pin states will be returned in



pin_count



bytes, and, if the pin count is not

a multiple of 7, ﬁlled up with 0 bits on the LSB side.

4.7.5 SET – Set output states

Function Sets pin range to high (= 1) or low (= 0) state

Command byte 0x83

Argument list First pin address to set, last pin address to set, binary state of

the write out

Example arguments 0x01 0x00 | 0x00 0x00 | 0x40 (set output pin P1 to high state)

If the last pin number equals 0, only one pin state will be changed. Pins that are not of

output type are skipped.

The binary state of the outputs is encoded in 1 byte per 7 pins. If the number of pins

being set is not a multiple of 7, unused bits in the last byte are ﬁlled up with zeros from the

LSB side.

Note that PWM output is only active for output pins in high state, i.e. this command can

also be used to turn PWM on and oﬀ.

 2017 jInvent. The speciﬁcations and information herein are subject to change without notice.