229
CHAPTER 14 SERIAL INTERFACE (SIO1)
Preliminary User’s Manual U13420EJ2V0UM00
Address: FF6BH After reset: 00H R/W
Note The data transfer interval time is calculated from the following expressions (n: Value set to ADTI00
to ADTI04).
<1> n = 0
Interval time =
2
+
0.5
f
SCK
f
SCK
<2> n = 1 to 31
Interval time =
n+1
+
0.5
f
SCK
f
SCK
Cautions
1. Do not write ADTI0 during operation of automatic data transmit/receive function.
2. Be sure to set bits 5 and 6 to 0.
3. When controlling the interval time of automatic transmit/receive data transfer by
using ADTI0, busy control is invalid. (Refer to 14.4.3 (4) (a) Busy control option.)
Remark
f
X
:
Main system clock oscillation frequency
f
SCK
: Serial clock frequency
Data transfer interval specification (f
X
= 8.38 MHz, f
SCK
= 1.05 MHz)
Note
ADTI04 ADTI03 ADTI02 ADTI01
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
16.2
s + 0.5/f
SCK
17.1
s + 0.5/f
SCK
18.1
s + 0.5/f
SCK
19.0
s + 0.5/f
SCK
20.0
s + 0.5/f
SCK
21.0
s + 0.5/f
SCK
21.9
s + 0.5/f
SCK
22.9
s + 0.5/f
SCK
23.8
s + 0.5/f
SCK
24.8
s + 0.5/f
SCK
25.7
s + 0.5/f
SCK
26.7
s + 0.5/f
SCK
27.6
s + 0.5/f
SCK
28.6
s + 0.5/f
SCK
29.5
s + 0.5/f
SCK
30.5
s + 0.5/f
SCK
6
5
4
3
2
1
0
7
Symbol
ADTI0
ADTI07
0
0
ADTI04 ADTI03 ADTI02 ADTI01 ADTI00
ADTI00
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
µ
µ
µ
µ
µ
µ
µ
µ
µ
µ
µ
µ
µ
µ
µ
µ
Содержание mPD780065 Series
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