NEC PD78056F User Manual page 396

Figure 18-5. Automatic Data Transmit/Receive Interval Specify Register Format (2/4)
Symbol
7 6 5
ADTI ADTI7 0 0
ADTI4 ADTI3 ADTI2 ADTI1
1 0 0
1 0 0
1 0 0
1 0 0
1 0 1
1
1 0
1 0 1
1 0 1
1 1 0
1 1 0
1 1 0
1 1 0
1 1 1
1 1 1
1 1
1
1 1 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
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
2. f
X
3. f
SCK
396
CHAPTER 18 SERIAL INTERFACE CHANNEL 1
4 3 2 1
ADTI4 ADTI3 ADTI2 ADTI1 ADTI0
Data Transfer Interval Specification (f
ADTI0
Minimum
0 0 223.2 s + 0.5/f
0 1 236.0 s + 0.5/f
1 0 248.8 s + 0.5/f
1 1 261.6 s + 0.5/f
0 0 274.4 s + 0.5/f
0
1 287.2 s + 0.5/f
1 0 300.0 s + 0.5/f
1 1 312.8 s + 0.5/f
0 0 325.6 s + 0.5/f
0 1 338.4 s + 0.5/f
1 0 351.2 s + 0.5/f
1 1 364.0 s + 0.5/f
0 0 376.8 s + 0.5/f
0
1 389.6 s + 0.5/f
1
0 402.4 s + 0.5/f
1 1 415.2 s + 0.5/f
6
2 28
+
f f
XX XX
6
2 36
+
f f
XX XX
: Main system clock frequency (f
: Main system clock oscillation frequency
: Serial clock frequency
0 Address After Reset
FF6BH 00H
XX
Note
SCK
SCK
SCK
SCK
SCK
SCK
SCK
SCK
SCK
SCK
SCK
SCK
SCK
SCK
SCK
SCK
0.5
+
f
SCK
1.5
+
f
SCK
or f /2)
X X
R/W
R/W
= 5.0 MHz Operation)
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
, the minimum interval time
SCK