Renesas RL78/G1H User Manual

RL78/G1H CHAPTER 16 DATA TRANSFER CONTROLLER (DTC)
R01UH0575EJ0120 Rev. 1.20 Page 530 of 920
Dec 22, 2016
16.4.1 Activation Sources
The DTC is activated by an interrupt signal from the peripheral functions. The interrupt signals to activate the
DTC are selected with the DTCENi (i = 0 to 4) register.
The DTC sets the corresponding bit among bits DTCENi0 to DTCENi7 in the DTCENi register to 0 (activation
disabled) during operation when the setting of data transfer (the first transfer in chain transfers) is either of the
following:
• A transfer that causes the DTCCTj (j = 0 to 23) register value to change to 0 in normal mode
• A transfer that causes the DTCCTj register value to change to 0 while the RPTINT bit in the DTCCRj register is
1 (interrupt generation enabled) in repeat mode
Figure 16 - 14 shows the DTC Internal Operation Flowchart.
Figure 16 - 14 DTC Internal Operation Flowchart
Note 0 is not written to the bit among bits DTCENi0 to DTCENi7 for data transfers activated by the setting to enable chain
transfers (the CHNE bit is 1). Also, no interrupt request is generated.
Transfer data
Branch (1)
Yes
Read control data
Read vector
DTC activation source
generation
Write back
control data
CHNE = 1?
No
Yes
No
Read control data
Transfer data
Write back
control data
CHNE = 1?
Write 0 to the bit among bits
DTCENi0 to DTCENi7
Generate an interrupt request
Transfer data
Write back
control data
CHNE = 1?
Yes
No
Yes
Read control data
Transfer data
Write back
control data
CHNE = 1?
Yes
No
No
Note
End
Interrupt handling
Branch (1)
0 is written to the bit among bits DTCENi0 to DTCENi7 and an interrupt request is generated when
transfer is either of the following:
- A transfer that causes the DTCCTj (j = 0 to 23) register value to change from 1 to 0 in normal mode
- A transfer that causes the DTCCTj register value to change from 1 to 0 while the RPTINT bit is 1 in
repeat mode
Remark DTCENi0 to DTCENi7: Bits in DTCENi (i = 0 to 4) register
RPTINT, CHNE: Bits in DTCCRj (j = 0 to 23) register

Renesas RL78/G1H Specifications

General

Brand	Renesas
Model	RL78/G1H
Category	Microcontrollers
Language	English