
TC63 AT Command Set
19.7 AT^SSPI
s
TC63_ATC_V00.490
Page 451 of 501
5/24/05
Confidential / Draft - Do not copy
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