CHAPTER 15 CLOCKED SERIAL INTERFACE 0 (CSI0)
User’s Manual U16896EJ2V0UD
453
Figure 15-5. Continuous Transfer (Transmission/Reception) Timing Chart
•
Transmit/receive type 1, 8-bit data length
dout-1
dout-1
SCK0n (I/O)
SO0n (output)
SI0n (input)
SOTBFnL
register
SOTBnL
register
SIO0nL
register
SIRBnL
register
Reg_WR
Reg_RD
CSOTn bit
INTCSI0n
signal
rq_clr
trans_rq
dout-2
dout-3
dout-4
dout-5
dout-2
dout-3
dout-4
dout-5
din-1
din-1
SOTBFn (d1)
SOTBn (d2)
SOTBn (d3)
SOTBn (d4)
SOTBn (d5)
SIRBn (d1)
SIRBn (d2)
<
5
>
<
7
>
<
8
>
<
4
>
<
5
>
<
4
>
<
6
>
Period during which
next transfer can be
reserved
<
5
>
<
4
>
<
3
>
<
2
>
<
1
>
SIRBn (d3)
SIRBn (d4)
SIO0n (d5)
din-2
din-3
din-4
din-5
din-2
din-3
din-4
din-5
Remarks 1.
Reg_WR: Internal signal. This signal indicates that the SOTBnL register has been written.
Reg_RD: Internal signal. This signal indicates that the SIRBnL register has been read.
rq_clr:
Internal signal. Transfer request clear signal.
trans_rq: Internal signal. Transfer request signal.
2.
n = 0, 1
In the case of the continuous transfer mode, two transfer requests are set at the start of the first transfer.
Following the INTCSI0n signal, transfer is continued if the SOTBnL register can be written within the next
transfer reservation period. If the SOTBnL register cannot be written, transfer ends and the SIRBnL
register does not receive the new value of the SIO0nL register.
The last receive data can be obtained by reading the SIO0nL register following completion of the transfer.