NEC uPD78056Y - Manual (Page 404)

404
CHAPTER 18 SERIAL INTERFACE CHANNEL 1
Figure 18-5. Automatic Data Transmit/Receive Interval Specify Register Format (4/4)
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 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 (f X or f X /2)
2. f X : Main system clock oscillation frequency
3. f
SCK
: Serial clock frequency
2 6
f XX
2 6
f
XX
28
f
XX
36
f
XX
0.5
f SCK
1.5
f SCK
Data Transfer Interval Specification (f XX = 2.5 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
446.4 s + 0.5/f
SCK
472.0 s + 0.5/f
SCK
497.6 s + 0.5/f
SCK
523.2 s + 0.5/f
SCK
548.8 s + 0.5/f SCK
574.4 s + 0.5/f SCK
600.0 s + 0.5/f SCK
625.6 s + 0.5/f SCK
651.2 s + 0.5/f
SCK
676.8 s + 0.5/f
SCK
702.4 s + 0.5/f
SCK
728.0 s + 0.5/f
SCK
753.6 s + 0.5/f
SCK
779.2 s + 0.5/f SCK
804.8 s + 0.5/f SCK
830.4 s + 0.5/f SCK
Maximum Note
449.6 s + 1.5/f
SCK
475.2 s + 1.5/f
SCK
500.8 s + 1.5/f
SCK
526.4 s + 1.5/f
SCK
552.0 s + 1.5/f SCK
577.6 s + 1.5/f SCK
603.2 s + 1.5/f SCK
628.8 s + 1.5/f SCK
654.4 s + 1.5/f
SCK
680.0 s + 1.5/f
SCK
705.6 s + 1.5/f
SCK
731.2 s + 1.5/f
SCK
756.8 s + 1.5/f
SCK
782.4 s + 1.5/f SCK
808.0 s + 1.5/f SCK
833.6 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