NEC PD78076 User Manual page 422

Figure 19-5. Automatic Data Transmit/Receive Interval Specify Register Format (2/4)
Symbol
7 6 5
ADTI ADTI7 0 0
ADTI4 ADTI3 ADTI2 ADTI1
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 1
1 1
1 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 to ADTI during operation of the automatic data transmit/receive function.
2. Bits 5 and 6 must be set to 0.
3. When controlling the data transfer interval by automatic transmit/receive using
ADTI, busy control (refer to 19.4.3 (4) (a) Busy control option) becomes invalid.
Remark f : Main system clock frequency (f
XX
f : Main system clock oscillation frequency
X
f : Serial clock frequency
SCK
422
CHAPTER 19 SERIAL INTERFACE CHANNEL 1
4 3 2 1
ADTI4 ADTI3 ADTI2 ADTI1 ADTI0
Data Transfer Interval Specification (f
ADTI0
0 0 0 223.2 s + 0.5/f
0 0 1 236.0 s + 0.5/f
0 1 0 248.8 s + 0.5/f
0 1 1 261.6 s + 0.5/f
1 0 0 274.4 s + 0.5/f
1 0 1 287.2 s + 0.5/f
1 1 0 300.0 s + 0.5/f
1 1 1 312.8 s + 0.5/f
0 0 0 325.6 s + 0.5/f
0 0 1 338.4 s + 0.5/f
0 1 0 351.2 s + 0.5/f
0 1 1 364.0 s + 0.5/f
1 0 0 376.8 s + 0.5/f
1 0 1 389.6 s + 0.5/f
1 1 0 402.4 s + 0.5/f
1 1 415.2 s + 0.5/f
.
6
2
+
f
XX
6
2
+
f
XX
0 Address After Reset
FF6BH 00H
Note
Minimum
µ
SCK
µ
SCK
µ
SCK
µ
SCK
µ
SCK
µ
SCK
µ
SCK
µ
SCK
µ
SCK
µ
SCK
µ
SCK
µ
SCK
µ
SCK
µ
SCK
µ
SCK
µ
SCK
28 0.5
+
f f
XX SCK
36 1.5
+
f f
XX SCK
or f /2)
X X
R/W
R/W
= 5.0-MHz Operation)
XX
Note
Maximum
224.8 s + 1.5/f µ
SCK
237.6 s + 1.5/f µ
SCK
250.4 s + 1.5/f µ
SCK
263.2 s + 1.5/f µ
SCK
276.0 s + 1.5/f µ
SCK
288.8 s + 1.5/f µ
SCK
301.6 s + 1.5/f µ
SCK
314.4 s + 1.5/f µ
SCK
µ
327.2 s + 1.5/f
SCK
340.0 s + 1.5/f µ
SCK
µ
352.8 s + 1.5/f
SCK
365.6 s + 1.5/f µ
SCK
µ
378.4 s + 1.5/f
SCK
391.2 s + 1.5/f µ
SCK
µ
404.0 s + 1.5/f
SCK
416.8 s + 1.5/f µ
SCK
, the minimum interval time
SCK