Renesas RX Series User Manual

R01UH0823EJ0100 Rev.1.00 Page 1326 of 1823
Jul 31, 2019
RX23W Group 37. Serial Sound Interface (SSI)
(2) Transmission Using Interrupts
Figure 37.19 Transmission Using Interrupts
Start
Set the SSIFCR.AUCKE bit to 1 in master
mode.
Set the SSICR register
configuration bits.
Enable an error interrupt,
enable a transmit interrupt,
enable transmit operation.
Setup the interrupt controller.
Wait for an interrupt.
Error interrupt?
More data to be sent?
Disable transmit operation,
disable an error interrupt,
enable an idle interrupt.
Wait for an idle interrupt
from this module
End
*1
No
No
Yes
Yes
Transmit underflow occurred?
*3
Yes
No
Transmit underflow occurred?
*3
Yes
No
TSWNO = 0?
No
Write 32-bit 0-data to the SSIFTDR register.
Clear the transmit underflow error interrupt
status flag.
Yes
Write transmit data
*2
,
clear the SSIFSR.TDE flag
Note 1. When restarting transmission after transmit operation is disabled (TEN = 0) while WS continue mode is
disabled, execute a software reset and go back to the start of the flowchart again.
Note 2. Write transmit data in 64-bit units regardless of the data word setting.
Note 3. Stop writing transmit data to the SSIFTDR register and wait until a transmit underflow occurs.
During transmit underflow, the last data input to SSIFTDR register is continuously transmitted until the module is
in the idle state.

Renesas RX Series Specifications

General

Brand	Renesas
Model	RX Series
Category	Microcontrollers
Language	English