369
CHAPTER 17 SERIAL INTERFACE CHANNEL 1
Figure 17-5. Format of Automatic Data Transmit/Receive Interval Specification Register (2/2)
ADTI4 ADTI3 ADTI2 ADTI1 ADTI0
Specifies interval time for data transfer (f
X
= 10.0 MHz operation)
Minimum value
Note
Maximum value
Note
1
0
0
0
0
223.2
μ
s + 0.5/f
SCK
224.8
μ
s + 1.5/f
SCK
1
0
0
0
1
236.0
μ
s + 0.5/f
SCK
237.6
μ
s + 1.5/f
SCK
1
0
0
1
0
248.8
μ
s + 0.5/f
SCK
250.4
μ
s + 1.5/f
SCK
1
0
0
1
1
261.6
μ
s + 0.5/f
SCK
263.2
μ
s + 1.5/f
SCK
1
0
1
0
0
274.4
μ
s + 0.5/f
SCK
276.0
μ
s + 1.5/f
SCK
1
0
1
0
1
287.2
μ
s + 0.5/f
SCK
288.8
μ
s + 1.5/f
SCK
1
0
1
1
0
300.0
μ
s + 0.5/f
SCK
301.6
μ
s + 1.5/f
SCK
1
0
1
1
1
312.8
μ
s + 0.5/f
SCK
314.4
μ
s + 1.5/f
SCK
1
1
0
0
0
325.6
μ
s + 0.5/f
SCK
327.2
μ
s + 1.5/f
SCK
1
1
0
0
1
338.4
μ
s + 0.5/f
SCK
340.0
μ
s + 1.5/f
SCK
1
1
0
1
0
351.2
μ
s + 0.5/f
SCK
352.8
μ
s + 1.5/f
SCK
1
1
0
1
1
364.0
μ
s + 0.5/f
SCK
365.6
μ
s + 1.5/f
SCK
1
1
1
0
0
376.8
μ
s + 0.5/f
SCK
378.4
μ
s + 1.5/f
SCK
1
1
1
0
1
389.6
μ
s + 0.5/f
SCK
391.2
μ
s + 1.5/f
SCK
1
1
1
1
0
402.4
μ
s + 0.5/f
SCK
404.0
μ
s + 1.5/f
SCK
1
1
1
1
1
415.2
μ
s + 0.5/f
SCK
416.8
μ
s + 1.5/f
SCK
Note
The interval time for data transfer is variable. The minimum and maximum values of the interval time
for transferring each data can be calculated by the following expressions (n: value placed in ADTI0
through ADTI4). If the minimum value calculated by the following expression is less than 2/f
SCK
,
however, the minimum interval time is assumed to be 2/f
SCK
.
Minimum value = (n + 1)
×
2
Maximum value = (n + 1)
×
2
Cautions 1. Do not write data to ADTI while the automatic transmit/receive function is in use.
2. Be sure to set bits 5 and 6 to 0.
3. To control the interval time for data transfer of automatic transmission/reception by
using ADTI, busy control becomes invalid (refer to 17.4.3 (4) (a) Busy control option).
Remark
f
X
f
SCK
: Serial clock frequency
: Main system clock oscillation frequency
7
6
5
4
3
2
Symbol
1
0
FF6BH
ADTI0
ADTI
ADTI1
ADTI3 ADTI2
ADTI4
0
0
ADTI7
Address
On reset
R/W
00H
R/W
7
f
X
7
f
X
56
f
X
72
f
X
0.5
f
SCK
1.5
f
SCK