CHAPTER 11 SERIAL INTERFACE FUNCTION
User’s Manual U14359EJ4V0UM
391
(7) Serial clock counter
The serial clock counter counts serial clocks that are output or input during transmit and receive operations
and checks that 8-bit data has been transmitted or received.
(8) Interrupt controller
The interrupt controller controls whether or not an interrupt request is generated when the serial clock counter
has counted eight serial clocks.
Figure 11-15. Clocked Serial Interface Block Diagram
f
XX
/2
15
f
XX
/2
14
f
XX
/2
12
f
XX
/2
10
f
XX
/2
8
f
XX
/2
6
f
XX
/2
4
SCKn
SIn
SCKn
SOn
INTCSIn
Control signal
Transmit data control
Serial clock controller
Clock start/stop control
&
clock phase control
Interrupt
controller
Selector
Transmission control
SO selection
SO latch
Transmit data buffer
register n (SOTBn)
Shift register n
(SIOn)
Remarks 1.
n = 0 to 2
2.
f
XX
: Internal system clock
