Linx-technologies LICAL-TRC-MT Instrukcja Użytkownika Pobierz pdf (Strona 12)

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18 19

Time t1 in the ﬁgure above does not have to be any speciﬁc time, just

so long as the SER_IO line goes high before the CRT/LRN line. Time t2

should be greater than 120µs (typical of 35ms, see the Mode Entry Timings

section) to ensure that the transcoder goes into Serial Mode. There is not a

maximum time speciﬁed. Once in Serial Mode, the transcoder waits for the

start byte (0x00) of the serial command.

The timings associated with each command and the transcoder’s response

are listed in Figure 14 (9,600bps) and Figure 15 (28,800bps).

To send consecutive commands, keep the CRT/LRN line high and take the

SER_IO line high within 50µs of the MODE_IND line going low.

It should be noted that all of the settings are written into non-volatile

memory, so they are retained if power is removed from the chip. This

includes all values, such as custom byte and target address, as well as the

enabled / disabled states.

start stop start stop

CRT/LRN (INPUT)

MODE_IND (OUTPUT)

SER_IO (INPUT/OUTPUT)

00 00 R

SER_IO = INPUT SER_IO = OUTPUT

1mSCCCCCCFF 4mS AAAR RRFF

Command Acknowledge/Response

b0 b1 b2 b3 b4 b5 b6 b6b7 b7b0 b1 b2 b3 b4 b5

Figure 13: MT Series Transcoder Serial Programming

MT Series Transcoder Serial Interface Engine Timings (ms) at 9,600bps

SER_IO = Input SR_IO = Output

Deﬁnition Min

Ready

Max

Ready

Receive

Cmd

Process

Cmd

Wait

Transmit

Finish

Process

Min Total

Time

Max Total

Time

Read Local Settings 0.08 33.00 8.30 1.11 4.00 9.58 0.04 23.11 56.03

Write Local Settings 0.08 33.00 8.30 1.03 4.00 5.29 17.89 36.59 69.51

Read Next User ID 0.08 33.00 8.30 1.06 4.00 6.38 0.04 19.86 52.78

Write Next User ID 0.08 33.00 8.30 1.04 4.00 5.29 3.65 22.36 55.28

Read Speciﬁc User 0.08 33.00 8.30 1.11 4.00 9.58 0.04 23.11 56.03

Write Speciﬁc User 0.08 33.00 8.30 1.04 4.00 5.29 14.30 33.05 65.93

Read Target Address 0.08 33.00 8.30 1.10 4.00 8.51 0.04 22.03 54.95

Write Target Address 0.08 33.00 8.30 1.05 4.00 5.29 10.74 29.46 62.38

Read Custom Data Value 0.08 33.00 8.30 1.07 4.00 6.38 0.04 19.87 52.79

Write Custom Data Value 0.08 33.00 8.30 1.05 4.00 5.29 3.65 22.37 55.29

Read Latch Mask Value 0.08 33.00 8.30 1.07 4.00 6.38 0.04 19.87 52.79

Write Latch Mask Value 0.08 33.00 8.30 1.05 4.00 5.29 3.65 22.37 55.29

Read Status Outputs 0.08 33.00 8.30 1.05 4.00 6.38 0.04 19.85 52.77

Write Status Inputs 0.08 33.00 8.30 1.06 4.00 5.29 ** 18.79 51.71

Read Conﬁrmation EN 0.08 33.00 8.30 1.07 4.00 6.38 0.04 19.87 52.79

Write Conﬁrmation EN 0.08 33.00 8.30 1.06 4.00 5.29 3.65 22.38 55.30

Read Device Targeting EN 0.08 33.00 8.30 1.08 4.00 6.38 0.04 19.88 52.80

Write Device Targeting EN 0.08 33.00 8.30 1.06 4.00 5.29 3.65 22.38 55.30

Read Custom Data EN 0.08 33.00 8.30 1.08 4.00 6.38 0.04 19.88 52.80

Write Custom data EN 0.08 33.00 8.30 1.07 4.00 5.29 3.65 22.39 55.31

MinRdy applies when MT is in Encoder Only mode.

MaxRdy applies when MT is in Transcoder mode and time may be longer due to possible receive timeout period.

Receive Command is calculated for 8 bytes at 9,600bps (104µs/bit).

Transmit Reply is measured on the SER_IO pin from the MT

** Finish Process time for the Write Status Inputs command = 0.06ms + (Packet Time * Number of Packets). See Figure 19 for Packet Time.

Figure 14: MT Series Transcoder Serial Interface Engine Timings (ms) at 9,600bps

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 20 21

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