CHAPTER 14 SERIAL INTERFACE CHANNEL 1
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User’s Manual U11302EJ4V0UM
(b) When automatic transmit/receive function is performed using an external clock
The external clock operation is selected when bit 1 (CSIM11) of serial operating mode register 1
(CSIM1) is cleared to 0.
When the automatic transmit/receive function is performed using an external clock, the clock must
be selected so that the interval is longer than the values shown below.
Table 14-4. Interval Determined by CPU Processing (with External Clock Operation)
CPU Processing
Interval
When using multiplication instruction
13T
CPU
or more
When using division instruction
20T
CPU
or more
External access 1-wait mode
9T
CPU
or more
Other than above
7T
CPU
or more
T
CPU
: 1/f
CPU
f
CPU
: CPU clock (set by bits 0 to 2 (PCC0 to PCC2) of the processor
clock control register (PCC))
Содержание mPD780208 Subseries
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