CHAPTER 12 SERIAL INTERFACE 1A0
234
User’s Manual U15331EJ4V1UD
Symbol
<7> 6
5 <4> <3> <2> <1> <0>
Address
After
reset
R/W
ADTI0 ADTI07
0
0
ADTI04 ADTI03 ADTI02 ADTI01 ADTI00 FF7BH
00H
R/W
ADTI04 ADTI03 ADTI02 ADTI01 ADTI00
Data transfer interval specification
(f
X
= 5.0 MHz, f
SCK
= 1.25 MHz)
Note 2
n
1 0 0 0 0
13.6
µ
s
+
0.5/f
SCK
16
1 0 0 0 1
14.4
µ
s
+
0.5/f
SCK
17
1 0 0 1 0
15.2
µ
s
+
0.5/f
SCK
18
1 0 0 1 1
16.0
µ
s
+
0.5/f
SCK
19
1 0 1 0 0
16.8
µ
s
+
0.5/f
SCK
20
1 0 1 0 1
17.6
µ
s
+
0.5/f
SCK
21
1 0 1 1 0
18.4
µ
s
+
0.5/f
SCK
22
1 0 1 1 1
19.2
µ
s
+
0.5/f
SCK
23
1 1 0 0 0
20.0
µ
s
+
0.5/f
SCK
24
1 1 0 0 1
20.8
µ
s
+
0.5/f
S
CK
25
1 1 0 1 0
21.6
µ
s
+
0.5/f
SCK
26
1 1 0 1 1
22.4
µ
s
+
0.5/f
SCK
27
1 1 1 0 0
23.2
µ
s
+
0.5/f
SCK
28
1 1 1 0 1
24.0
µ
s
+
0.5/f
SCK
29
1 1 1 1 0
24.8
µ
s
+
0.5/f
SCK
30
1 1 1 1 1
25.6
µ
s
+
0.5/f
SCK
31
Notes 1.
The interval time depends only on the CPU processing.
2.
The data transfer interval time is found from the following expressions (n: Value set to ADTI00 to
ADTI04).
<1> n = 0
Interval time =
+
<2> n = 1 to 31
Interval time =
+
Cautions 1. Do not write to ADTI0 during operation of the automatic transmit/receive function.
2. Be sure to set bits 5 and 6 to 0.
Remark
f
X
:
Main system clock oscillation frequency
f
SCK
: Serial clock frequency
2
f
SCK
0.5
f
SCK
n+1
f
SCK
0.5
f
SCK