Slave Transmission (Single Mode) - Renesas RZ/A Series User Manual

RZ/A1L Group, RZ/A1LU Group, RZ/A1LC Group
22.5.7

Slave transmission (single mode)

Table 22-50 Standard initial processing
Register name
IEBBnDLR
IEBBnDR
Caution
Table 22-51 Communication startup processing
Register name
IEBBnBCR
Start
IEBBTSTA
IEBBTV
IEBBTD
Figure 22-26 When the control bit 3H or 7H, which is addressed to the unit, is received
R01UH0437EJ0600 Rev.6.00
Jan 29, 2021
The unit transfers data and commands to the master unit as a slave.
Data interrupts are used to write transmission data to the IEBBnDR register for each
one-byte transfer.
(1) Register settings
After specifying the initial settings in 22.5.2 Initial settings, set up the registers
below before starting communication.
Message length (other than during slave status transmission)
Data (1st byte of data)
When starting slave transmission, information such as the value to be set to
the message length register (IEBBnDLR) and which data is to be returned (the
value to be set to the IEBBnDR register) must be assigned in advance by the
master, such as during separate communication.
Communication startup processing
(2) Interrupt occurrence timing
(a) When the control bit 3H or 7H, which is addressed to the unit, is received
Broad
M address P S address P A Control
cast
Function
Function
Message
P A P A Data 1
length
Start interrupt
Start interrupt
Data interrupt
22. IEBus Controller
P A Data 2 P A ... Data n
Transmission
end interrupt
Transmission
end interrupt
Note
No data interrupt occurs
because this is frame end data.
Example
02H
11H
Example
90H
P A
22-90