Anybus CompactCom 40 Network Manual page 235

Appendix H: Backward Compatibility
GIP[0..1]/LED3[A..B]
These pins are tri-stated inputs by default in the 30-series. In the 40-series, these pins are tri-
stated until the state NW_INIT. After that they become open-drain, active low LED outputs (LE-
D3A/LED3B).
No modification of the hardware is needed, if your current design has
• tied these pins to GND
• pulled up the pins
• pulled down the pins
• left the pins unconnected
However, if the application drive the pins high, a short circuit will occur.
If you connect the pins to LEDs, a pull-up is required.
In the 40-series, there is a possibility to set the GIP[0..1] and GOP[0..1] in high impedance state
(tri-state) by using attribute #16 (GPIO configuration) in the Anybus object (01h). I.e. if it is not
possible to change the host application hardware, this attribute can be configured for high impe-
dance state of GIP and GOP before leaving NW_INIT state.
Related Information: Anybus CompactCom M40 Hardware Design Guide (HMSI-216-126), Sec-
tion "LED Interface/D8-D15 (Data Bus)".
GOP[0..1]/LED4[A..B]
These pins are outputs (high state) by default in the 30-series. In the 40-series, these pins are
tri-stated until the state NW_INIT, and after that they become push-pull, active low LED outputs
(LED4A/LED4B).
This change should not affect your product.
Related Information: Anybus CompactCom M40 Hardware Design Guide (HMSI-216-126), Sec-
tion 3.2.3, "LED Interface/D8-D15 (Data Bus)".
Address Pins A[11..13]
The address pins 11, 12, and 13 are ignored by the 30-series. These pins must be high when
accessing the 40-series module in backwards compatible 8-bit parallel mode. If you have left
these pins unconnected or connected to GND, you need to make a hardware modification to tie
them high.
Max Input Signal Level (V
The max input signal level for the 30-series is specified as V
as V =3.45 V. Make sure that you do not exceed 3.45V for a logic high level.
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=V +0,2 V, and for the 40-series
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