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Figure 18-5. Automatic Data Transmit/Receive Interval Specify Register Format (3/4)
Symbol
7
6
5
ADTI ADTI7
0
0
ADTI4 ADTI3 ADTI2 ADTI1 ADTI0
ADTI7
0
No control of interval by ADTI
1
Control of interval by ADTI (ADTI0 to ADTI4)
ADTI4 ADTI3 ADTI2 ADTI1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
1
0
0
1
0
0
1
0
1
0
0
1
0
0
1
0
0
1
0
0
1
1
0
1
1
0
1
1
0
1
1
Notes 1. The interval is dependent only on CPU processing.
2. 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 a
minimum which is calculated by the following expressions is smaller than 2/f
interval time is 2/f
Minimum = (n+1)
Maximum = (n+1)
Cautions 1. Do not write ADTI during operation of automatic data transmit/receive function.
2. Bits 5 and 6 must be set to zero.
3. If the auto send and receive data transmission interval time is controlled using ADTI,
busy control becomes invalid (see 18.4.3 (4) (a) Busy control option).
Remarks 1. f
XX
2. f
X
3. f
SCK
CHAPTER 18 SERIAL INTERFACE CHANNEL 1
4
3
2
1
0
Data Transfer Interval Control
Note 1
Data Transfer Interval Specification (f
ADTI0
Minimum
0
0
36.8 s + 0.5/f
0
1
62.4 s + 0.5/f
1
0
88.0 s + 0.5/f
1
1
113.6 s + 0.5/f
0
0
139.2 s + 0.5/f
0
1
164.8 s + 0.5/f
1
0
190.4 s + 0.5/f
1
1
216.0 s + 0.5/f
0
0
241.6 s + 0.5/f
0
1
267.2 s + 0.5/f
1
0
292.8 s + 0.5/f
1
1
318.4 s + 0.5/f
0
0
344.0 s + 0.5/f
0
1
369.6 s + 0.5/f
1
0
395.2 s + 0.5/f
1
1
420.8 s + 0.5/f
.
SCK
6
2
28
+
f
f
XX
XX
6
2
36
+
f
f
XX
XX
: Main system clock frequency (f
: Main system clock oscillation frequency
: Serial clock frequency
Address
After Reset
R/W
FF6BH
00H
R/W
= 2.5 MHz Operation)
XX
Maximum
Note 2
40.0 s + 1.5/f
SCK
65.6 s + 1.5/f
SCK
91.2 s + 1.5/f
SCK
116.8 s + 1.5/f
SCK
142.4 s + 1.5/f
SCK
168.0 s + 1.5/f
SCK
193.6 s + 1.5/f
SCK
219.2 s + 1.5/f
SCK
244.8 s + 1.5/f
SCK
270.4 s + 1.5/f
SCK
296.0 s + 1.5/f
SCK
321.6 s + 1.5/f
SCK
347.2 s + 1.5/f
SCK
372.8 s + 1.5/f
SCK
398.4 s + 1.5/f
SCK
424.0 s + 1.5/f
SCK
0.5
+
f
SCK
1.5
+
f
SCK
or f
/2)
X
X
Note 2
SCK
SCK
SCK
SCK
SCK
SCK
SCK
SCK
SCK
SCK
SCK
SCK
SCK
SCK
SCK
SCK
, the minimum
SCK
397
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