661
Chapter 16
Clocked Serial Interface B (CSIB)
User’s Manual U16580EE3V1UD00
16.4.7 Continuous reception mode (error)
Figure 16-15:
Continuous Reception Mode (Error)
MSB First (CBnDIR Bit of CBnCTL0 Register = 0),
CBnCKP Bit of the CBnCTL1 Register = 0,
CBnDAP Bit of the CBnCTL1 Register = 1,
Transfer Data Length = 8 Bits (CSnCL3 to CBnCL0 Bits of CBnCTL2 Register = 0000B)
<1> Set the CBnCTL1 and CBnCTL2 registers to specify the transfer mode.
<2> Set the CBnTXE and CBnRXE bits of the CBnCTL0 register to 1 at the same time as specifying
the transfer mode using the CBnDIR bit of the CBnCTL0 register, to set the transmission/
reception enable status.
<3> Set the CBnPWR bit of the CBnCTL0 register to 1 to enable CSIB operating clock supply.
<4> Perform a dummy read of the CBnRX register (reception start trigger).
<5> The reception complete interrupt (INTCBnR) is output, notifying the CPU that reading the CBnRX
(CBnRXL) register is possible.
<6> If the data could not be read before the end of the next transfer, a receive error interrupt
(INTCBnRE) is output and the CBnOVE flag of the CBnSTR register is set (1). The CBnRX
register is read as error restore processing.
<7> Check that the CBnTSF bit of the CBnSTR register is 0 and clear the CBnPWR bit to 0 to stop
clock supply to CSIBn (end of reception).
Remark:
μ
PD70F3187: n = 0, 1
μ
PD70F3447: n = 0
1
0
0
0
0
0
0
1
1
1
1
1
1
SCKBn pin
SIBn pin
INTCBnR
signal
INTCBnRE
signal
0
1
0
<1>
<2>
<3>
<7>
<6>
<5>
<4>
00H
Shift
register n
CBnRX
register
CBnOVE flag
55H
55H
AAH
Содержание V850E/PH2
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