RL78/G1H
CHAPTER 18 RF TRANSCEIVER
Page 652 of 920
18.5.2
Communication specification
Table 18 - 10 shows the internal communication specification.
Note 1.
For details, see
CHAPTER 31
ELECTRICAL SPECIFICATIONS
.
Note 2.
For details, see
CHAPTER 14 SERIAL ARRAY UNIT
.
Table 18 - 10 Internal Communication Specification
Item
MCU
RF Unit
CSI20
SPI
Target channel
Serial array unit (SAU1) channel 0 (CSI20)
Serial interface (SPI)
Internal pin to be used
• SCK20, SI20, and SO20 inside-only pins
3-wire CSI communication pin
• P16 inside-only pin
Port pin for SEN control
• SCK, SIN, SOUT, and SEN inside-only pins
4-Wire SPI communication pin
Operating mode
Transmission mode/Transmission/reception mode Transmission/reception mode
Master/slave
Only master is supported.
Slave
Interrupt
Selectable from the following types.
• Transfer end interrupt
(in single-transfer mode)
• Buffer empty interrupt
(in continuous transfer mode)
None
Error detection flag
Overrun/error detection flag
None
Transfer data length
Only 8 bits are supported.
8 bits
Transfer rate
Within a range that satisfies the electrical
characteristics (AC specification)
With in the range described in the left
Data phase
Only Type 1 is supported.
Equivalent to the description in the left
Clock phase
Only Type 1 is supported.
Equivalent to the description in the left
Data direction
Only MSB is supported.
MSB
Software setting
As described above
Not especially
(Controlling SEN pin to be fixed at the low level
allows the communication.)
Summary of Contents for RL78/G1H
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