660
Chapter 16
Clocked Serial Interface B (CSIB)
User’s Manual U16580EE3V1UD00
16.4.6 Continuous mode (master mode, reception mode)
Figure 16-14:
Continuous Mode (Master Mode, Reception Mode)
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 CBnRXE bit 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 reception enabled status.
<3> Set the CBnPWR bit of the CBnCTL0 register is 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. Read the CBnRX register before the next receive data arrives or
before the CBnPWR bit is cleared to 0.
<6> Clear the CBnSCE bit of the CBnCTL0 register is 0 to set the reception end data status.
<7> Check that the CBnTSF bit of the CBnSTR register is 0 and clear the CBnPWR bit to 0 to stop
clock supply to CSIB (end of reception).
To continue transfer, repeat steps <4> and <5> before <6>.
Remark:
μ
PD70F3187: n = 0, 1
μ
PD70F3447: n = 0
<1>
<2>
<3>
<7>
<5>
<5>
<6>
<4>
1
0
0
0
0
0
0
0
1
1
1
1
1
55H
SCKBn pin
CBnSCE bit
SIBn pin
INTCnR
signal
Shift
register n
CBnRX
register
1
1
0
55H
AAH
AAH
00H
00H
Содержание V850E/PH2
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