Siemens TC63 - Manual (Page 451)

TC63 AT Command Set
19.7 AT^SSPI
s
TC63_ATC_V00.490 Page 451 of 501 5/24/05
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I²C: This parameter specifies a delay after a write frame. See Section 19.7.1 , Specifying Delay Time for I²C for
further details.
[0]
(&F) ...FFFF (Unsigned 16 bit value)
I²C: This parameter specifies the delay after a read frame. See Section 19.7.1 , Specifying Delay Time for I²C for
further details.
[0]
(&F) ...FFFF (Unsigned 16 bit value)
19.7.1 Specifying Delay Time for I²C
The following figures are provided to assist you in specifying appropriate values for the parameters
<delayOne>
and
<delayTwo>
. All delays are relative to the data transfer rate. To calculate the delay use the formula and the
values given below.
Table 19.2: Values for calculating the delay
Subparameter Bit Hexadecimal Selected function
Interface type D15 - D12 0 I²C bus (default)
Port D11 - D8 0 Internal port
Data transfer rate D7 - D4 0
1
I²C at 100 kbps
I²C at 400 kbps (default)
Protocol D3 - D0 0 ASCII (hex coding)
<delayOne>
(num)
<delayTwo>
(num)
Figure 19.1: Formula for calculating the delay
Parameter Values
Delay value Value set with parameter
<delayOne>
or
<delayTwo>
Master clock 13 MHz
Default data transfer rate 400 bps
User data transfer rate Value selected with subparameter data transfer rate within
<basicConfigura-
tion>
, for example 100 kbps or 400 kbps
Delay_min for Write 7.4 µs at 100 kbps
2.0 µs at 400 kbps
Delay_min for Read 9.9 µs at 100 kbps
2.6 µs at 400 kbps