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413
CHAPTER 18 SERIAL INTERFACE CHANNEL 1
Note The data transfer interval includes an error. The data transfer minimum and maximum intervals
are found from the following expressions (n: Value set in ADTI0 to ADTI4). However, if a minimum
which is calculated by the following expressions is smaller than 2/f
SCK, the minimum interval time
is 2/fSCK.
Minimum = (n+1) × + +
Maximum = (n+1) × + +
Cautions 1. Do not write data to ADTI during operation of automatic data transmit/receive
function.
2. Bits 5 and 6 must be set to zero.
3. To control the data transfer interval by means of automatic transmission/reception
with ADTI, busy control (refer to 18.4.3 (4) (a) Busy control option) is disabled.
Remarks 1. f
XX : Main system clock frequency (fX or fX/2)
2. fX : Main system clock oscillation frequency
3. f
SCK : Serial clock frequency
2
6
fXX
2
6
fXX
28
0.5
f
XX
fSCK
36 1.5
f
XX fSCK
Data Transfer Interval Specification (f
XX
= 5.0 MHz Operation)
ADTI4 ADTI3 ADTI2 ADTI1
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
Minimum
Note
223.2
s + 0.5/f
SCK
236.0
s + 0.5/f
SCK
248.8
s + 0.5/f
SCK
261.6
s + 0.5/f
SCK
274.4
s + 0.5/f
SCK
287.2
s + 0.5/f
SCK
300.0
s + 0.5/f
SCK
312.8
s + 0.5/f
SCK
325.6
s + 0.5/f
SCK
338.4
s + 0.5/f
SCK
351.2
s + 0.5/f
SCK
364.0
s + 0.5/f
SCK
376.8
s + 0.5/f
SCK
389.6
s + 0.5/f
SCK
402.4
s + 0.5/f
SCK
415.2
s + 0.5/f
SCK
Maximum
Note
224.8
s + 1.5/f
SCK
237.6
s + 1.5/f
SCK
250.4
s + 1.5/f
SCK
263.2
s + 1.5/f
SCK
276.0
s + 1.5/f
SCK
288.8
s + 1.5/f
SCK
301.6
s + 1.5/f
SCK
314.4
s + 1.5/f
SCK
327.2
s + 1.5/f
SCK
340.0
s + 1.5/f
SCK
352.8
s + 1.5/f
SCK
365.6
s + 1.5/f
SCK
378.4
s + 1.5/f
SCK
391.2
s + 1.5/f
SCK
404.0
s + 1.5/f
SCK
416.8
s + 1.5/f
SCK
65432107
Symbol
ADTI ADTI7 0 0 ADTI4 ADTI3 ADTI2 ADTI1 ADTI0
FF6BH 00H R/W
Address After Reset R/W
ADTI0
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
µ
µ
µ
µ
µ
µ
µ
µ
µ
µ
µ
µ
µ
µ
µ
µ