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Figure 14-5. Format of Automatic Data Transmit/Receive Interval Specification Register (2/2)
Symbol
7
6
5
ADTI ADTI7
0
0
ADTI4 ADTI3 ADTI2 ADTI1 ADTI0
1
0
0
1
0
0
1
0
0
1
0
0
1
0
1
1
0
1
1
0
1
1
0
1
1
1
0
1
1
0
1
1
0
1
1
0
1
1
1
1
1
1
1
1
1
1
1
1
Note The data transfer interval includes an error. The data transfer minimum and maximum intervals
are found from the following expressions (n: Value set in ADTI0 to ADTI4). However, if the
minimum calculated by the following expression is smaller than 2/f
is 2/f
.
SCK
Minimum = (n + 1) ×
Maximum = (n + 1) ×
Cautions 1. ADTI should not be written to during operation of the automatic transmit/receive
function.
2. Bits 5 and 6 must be set to 0.
3. When ADTI is used to control the interval time of data transfer by automatic transmit/
receive function, busy control (refer to 14.4.3 (4) (a) Busy control option) is invalid.
Remarks 1. f
:
X
2. f
SCK
CHAPTER 14 SERIAL INTERFACE CHANNEL 1
4
3
2
1
ADTI4 ADTI3 ADTI2 ADTI1 ADTI0
Data transfer interval specification (f
0
0
0
1
1
0
1
1
0
0
0
1
1
0
1
1
0
0
0
1
1
0
1
1
0
0
0
1
1
0
1
1
2
7
56
+
f
f
X
X
7
2
72
+
f
f
X
X
Main system clock oscillation frequency
: Serial clock frequency
User's Manual U11302EJ4V0UM
0
Address
After reset
FF6BH
00H
Minimum
Note
446.4 µ s + 0.5/f
SCK
472.0 µ s + 0.5/f
SCK
497.6 µ s + 0.5/f
SCK
523.2 µ s + 0.5/f
SCK
548.8 µ s + 0.5/f
SCK
574.4 µ s + 0.5/f
SCK
600.0 µ s + 0.5/f
SCK
625.6 µ s + 0.5/f
SCK
651.2 µ s + 0.5/f
SCK
676.8 µ s + 0.5/f
SCK
702.4 µ s + 0.5/f
SCK
728.0 µ s + 0.5/f
SCK
753.6 µ s + 0.5/f
SCK
779.2 µ s + 0.5/f
SCK
804.8 µ s + 0.5/f
SCK
830.4 µ s + 0.5/f
SCK
0.5
+
f
SCK
1.5
+
f
SCK
R/W
R/W
= 5.0 MHz operation)
X
Maximum
Note
449.6 µ s + 1.5/f
SCK
475.2 µ s + 1.5/f
SCK
500.8 µ s + 1.5/f
SCK
526.4 µ s + 1.5/f
SCK
552.0 µ s + 1.5/f
SCK
577.6 µ s + 1.5/f
SCK
603.2 µ s + 1.5/f
SCK
628.8 µ s + 1.5/f
SCK
654.4 µ s + 1.5/f
SCK
680.0 µ s + 1.5/f
SCK
705.6 µ s + 1.5/f
SCK
731.2 µ s + 1.5/f
SCK
756.8 µ s + 1.5/f
SCK
782.4 µ s + 1.5/f
SCK
808.0 µ s + 1.5/f
SCK
833.6 µ s + 1.5/f
SCK
, the minimum interval time
SCK
267
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