Renesas RL78 Series User Manual

RL78/F13, F14 CHAPTER 19 DTC
R01UH0368EJ0210 Rev.2.10 1458
Dec 10, 2015
(1) Example of using chain transfers: Consecutively capturing A/D conversion results and UART transmission
The DTC is activated by an A/D conversion end interrupt and A/D conversion results are transferred to RAM, and
then transmitted using the UART.
 The vector address is FFB09H.
 Control data of capturing A/D conversion results is allocated at FFBA0H to FFBA7H.
 Control data of UART transmission is allocated at FFBA8H at FFBAFH.
 An A/D conversion end interrupt is assigned to source number 9.
 Transfers 2-byte data of the A/D conversion result register (FFF1FH, FFF1EH) to FFD80H to FFDCFH of RAM,
and transfers the upper 1 byte (FFF1FH) of the A/D conversion result register to the UART transmit buffer
(FFF10H).
Figure 19-27. Example of Using Chain Transfers: Consecutively Capturing A/D Conversion Results and UART
Transmission
Cautions 1. Set the CHNE bit in the DTCCR23 register to 0 (chain transfers disabled).
2. For chain transfer, in the second and subsequent data transfers, bits DTCENi0 to DTCENi7 (i = 0 to
5
Note
) in the DTCENi register are not set to 0 (DTC activation disabled), and no interrupt request is
generated.
Note Products of groups A, B, C, and D: i = 0 to 4
Products of group E: i = 0 to 5
RAM
A/D conversion result
register
DTCBAR= FBH
DTCEN16 = 1
UART setting
Starting A/D conversion
No
Transfer from A/D conversion
result register to RAM
Yes
Yes
No
A/D conversion
end interrupt?
Transfer from A/D conversion result
Interrupt handling
FDCEH
FD80H
Transfer from A/D conversion
result register to RAM
Transfer from A/D conversion result
The processing show n inside the dotted
line is automatically executed by the DTC.
Setting control data of capturing
A/D conversion results
Vector address (FFB09H) =A0H
DTCCR12 (FFBA0H) = 58H
DTBLS12 (FFBA1H) = 01H
DTCCT12 (FFBA2H) = 50H
DTRLD12 (FFBA3H) = 50H
DTSAR12 (FFBA4H) = FF1EH
DTDAR12 (FFBA6H) = FD80H
Setting control data
of UART transmission
Vector address (FFB11H) = A8H
DTCCR13(FFBA8H) = 00H
DTBLS13(FFBA9H) = 01H
DTCCT13(FFBAAH) = 00H
DTRLD13(FFBABH) = 00H
DTSAR13(FFBACH) = FF1FH
DTDAR13(FFBAEH) = FF10H
Occurrence of interrupt
corresponding to source number 9
DTCEN16 = 0
DTCCT12 = 01H?

Renesas RL78 Series Specifications

General

Brand	Renesas
Model	RL78 Series
Category	Computer Hardware
Language	English