224
CHAPTER 8 APPLICATIONS OF SERIAL INTERFACE
Figure 8-17. Format of Automatic Data Transfer/Reception Interval Specification Register
(
μ
PD78098, 78098B subseries) (1/2)
ADTI7
Controls interval time of data transfer
0
Does not control interval time by ADTI
Note 1
1
Controls interval time by ADTI (ADTI0 through ADTI4)
ADTI4 ADTI3 ADTI2 ADTI1 ADTI0
Specifies interval time of data transfer (f
XX
= 4.0 MHz)
Minimum value
Note 2
Maximum value
Note 2
0
0
0
0
0
23.0
μ
s + 0.5/f
SCK
25.0
μ
s + 1.5/f
SCK
0
0
0
0
1
39.0
μ
s + 0.5/f
SCK
41.0
μ
s + 1.5/f
SCK
0
0
0
1
0
55.0
μ
s + 0.5/f
SCK
57.0
μ
s + 1.5/f
SCK
0
0
0
1
1
71.0
μ
s + 0.5/f
SCK
73.0
μ
s + 1.5/f
SCK
0
0
1
0
0
87.0
μ
s + 0.5/f
SCK
89.0
μ
s + 1.5/f
SCK
0
0
1
0
1
103.0
μ
s + 0.5/f
SCK
105.0
μ
s + 1.5/f
SCK
0
0
1
1
0
119.0
μ
s + 0.5/f
SCK
121.6
μ
s + 1.5/f
SCK
0
0
1
1
1
135.0
μ
s + 0.5/f
SCK
137.0
μ
s + 1.5/f
SCK
0
1
0
0
0
151.0
μ
s + 0.5/f
SCK
153.0
μ
s + 1.5/f
SCK
0
1
0
0
1
167.0
μ
s + 0.5/f
SCK
169.0
μ
s + 1.5/f
SCK
0
1
0
1
0
183.0
μ
s + 0.5/f
SCK
185.0
μ
s + 1.5/f
SCK
0
1
0
1
1
199.0
μ
s + 0.5/f
SCK
201.0
μ
s + 1.5/f
SCK
0
1
1
0
0
215.0
μ
s + 0.5/f
SCK
217.0
μ
s + 1.5/f
SCK
0
1
1
0
1
231.0
μ
s + 0.5/f
SCK
233.0
μ
s + 1.5/f
SCK
0
1
1
1
0
247.0
μ
s + 0.5/f
SCK
249.0
μ
s + 1.5/f
SCK
0
1
1
1
1
263.0
μ
s + 0.5/f
SCK
265.0
μ
s + 1.5/f
SCK
Notes 1.
The interval time is dependent on only the CPU processing.
2.
The interval time of data transfer includes an error margin. The minimum and maximum values of the
interval time for data transfer can be calculated by the following expressions (where n is the value set
to ADTI0 through ADTI4). However, if the minimum value calculated by the expression below is less
than 2/f
SCK
, the minimum interval time is 2/f
SCK
.
Minimum value = (n+1)
×
+ 28
Maximum value = (n+1)
×
+ 36
2
6
f
XX
f
XX
0.5
f
SCK
2
6
f
XX
f
XX
1.5
f
SCK
7
6
5
4
3
2
Symbol
1
0
FF6BH
ADTI0
ADTI
ADTI1
ADTI3 ADTI2
ADTI4
0
0
ADTI7
Address
At reset
R/W
00H
R/W