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CHAPTER 14 SERIAL INTERFACE (SIO1)
Preliminary User’s Manual U13420EJ2V0UM00
(c) Automatic data transmit/receive interval specification register (ADTI0)
This register sets the automatic data transmit/receive function data transfer interval.
ADTI0 is set with a 1-bit or 8-bit memory manipulation instruction.
RESET input sets ADTI to 00H.
Address: FF6BH After reset: 00H R/W
Notes 1. The interval time is 2/f
SCK
.
2. 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 2
ADTI04 ADTI03 ADTI02 ADTI01
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
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
1.90
s + 0.5/f
SCK
2.86
s + 0.5/f
SCK
3.81
s + 0.5/f
SCK
4.76
s + 0.5/f
SCK
5.71
s + 0.5/f
SCK
6.67
s + 0.5/f
SCK
7.62
s + 0.5/f
SCK
8.57
s + 0.5/f
SCK
9.52
s + 0.5/f
SCK
10.5
s + 0.5/f
SCK
11.4
s + 0.5/f
SCK
12.4
s + 0.5/f
SCK
13.3
s + 0.5/f
SCK
14.3
s + 0.5/f
SCK
15.2
s + 0.5/f
SCK
6
5
4
3
2
1
0
7
Symbol
ADTI0
ADTI07
0
0
ADTI04 ADTI03 ADTI02 ADTI01 ADTI00
ADTI07
0
Data transfer interval control
No control of interval by ADTI0
Note 1
Control of interval by ADTI0 (ADTI00 to ADTI04)
1
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
Содержание mPD780065 Series
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