Echelon I/O Model Reference for Smart Transceivers and Neu Instrukcja Użytkownika Pobierz pdf (Strona 46)

36 Direct I/O Models

IO10

IO9

IO8

IO0

IO1

IO2

IO3

IO4

IO5

IO6

High Current Sink Drivers Optional Pull-Up Resistors

IO10

IO9

IO8

IO0

IO1

IO2

IO3

IO4

IO5

IO6

IO7 IO7

IO11

Figure 10. Byte I/O for Series 3100 Devices

Figure 11 and Figure 12 show the byte input and byte output latency times,

respectively. These are the times from the call to the io_in() or io_out() function,

until a value is returned. The direction of bit ports can be changed between input

and output dynamically by using the io_set_direction() function.

Figure 11. Byte Input Timing

Table 13. Byte Input Latency Values for Series 3100 Devices

Symbol Description Typical at 10 MHz

fin

Function call to sample 24 μs

ret

Return from function 4 μs

Figure 12. Byte Output Timing

1 2 ... 41 42 43 44 45 46 47 48 49 50 51 ... 208 209

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Echelon I/O Model Reference for Smart Transceivers and Neu Instrukcja Użytkownika Strona 46