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CHAPTER 14 SERIAL ARRAY UNIT
Page 372 of 920
14.5.3
Master transmission/reception
Master transmission/reception is that the RL78 microcontroller outputs a transfer clock and transmits/receives
data to/from other device.
Note
Use this operation within a range that satisfies the conditions above and the peripheral functions characteristics in the
electrical specifications (see
ELECTRICAL SPECIFICATIONS
).
3-Wire Serial I/O
CSI10
CSI20
CSI21
CSI30
Target channel
Channel 2 of SAU0
Channel 0 of SAU1
Channel 1 of SAU1
Channel 2 of SAU1
Pins used
SCK10, SI10, SO10
SCK20, SI20, SO20
SCK21, SI21, SO21
SCK30, SI30, SO30
Interrupt
INTCSI10
INTCSI20
INTCSI21
INTCSI30
Transfer end interrupt (in single-transfer mode) or buffer empty interrupt (in continuous transfer mode) can
be selected.
Error detection flag
Overrun error detection flag (OVFmn) only
Transfer data length
7 or 8 bits
Max. f
CLK
/4 [Hz]
Min. f
CLK
/(2
×
2
15
×
128) [Hz] f
CLK
: System clock frequency
Data phase
Selectable by the DAPmn bit of the SCRmn register
• DAPmn = 0: Data I/O starts at the start of the operation of the serial clock.
• DAPmn = 1: Data I/O starts half a clock before the start of the serial clock operation.
Clock phase
Selectable by the CKPmn bit of the SCRmn register
• CKPmn = 0: Non-reverse
• CKPmn = 1: Reverse
Data direction
MSB or LSB first
Содержание RL78/G1H
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