NEC PD78058FY(A) User Manual
Page 396
396
CHAPTER 18 SERIAL INTERFACE CHANNEL 1
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
6
5
4
3
2
1
0
7
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
Figure 18-5. Automatic Data Transmit/Receive Interval Specify Register Format (2/4)
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/f
SCK
.
Minimum = (n+1)
×
+
+
Maximum = (n+1)
×
+
+
Cautions 1. Do not write ADTI during operation of automatic data transmit/receive function.
2. Zero must be set in bits 5 and 6.
3. If the auto send and receive data transmission interval time is controlled using ADTI,
busy control becomes invalid (see 18.4.3 (4) (a) Busy control option).
Remarks 1. f
XX
: Main system clock frequency (f
X
or f
X
/2)
2. f
X
: Main system clock oscillation frequency
3. f
SCK
: Serial clock frequency
2
6
28
0.5
f
XX
f
XX
f
SCK
2
6
36
1.5
f
XX
f
XX
f
SCK