NEC mPD780208 Subseries User Manual page 276

Notes 1. The interval is dependent only on CPU processing.
2. The data transfer interval includes an error. The data transfer minimum and maximum
intervals are found from the following expressions (n:
However, if the minimum calculated by the following expression is smaller than 2/f
minimum interval time is 2/f
Minimum = (n + 1) ×
Maximum = (n + 1) ×
Cautions 1. ADTI should not be written to during operation of the automatic transmit/receive
function.
2. Bits 5 and 6 must be set to 0.
3. When ADTI is used to control the interval time of data transfer by automatic
transmit/receive function, busy control (refer to 14.4.3 (4) (a) Busy control option)
is invalid.
Remarks 1. f :
X
2. f
SCK
276
CHAPTER 14 SERIAL INTERFACE CHANNEL 1
.
SCK
7
2
+
f
X
2 7
+
f
X
Main system clock oscillation frequency
: Serial clock frequency
User's Manual U11302EJ4V0UM
56 0.5
+
f f
X SCK
72 1.5
+
f f
X SCK
Value set in ADTI0 to ADTI4).
SCK
, the