Renesas RL78/F14 User Manual

RL78/F13, F14 CHAPTER 8 TIMER RD
R01UH0368EJ0210 Rev.2.10 647
Dec 10, 2015
8.4 Timer RD Interrupt
Timer RD generates the timer RDi (i = 0 or 1) interrupt request from six sources for each timer RD0 and timer RD1.
Table 8-20 lists the Registers Associated with Timer RD Interrupt and Figure 8-62 shows the Timer RD Interrupt Block
Diagram.
Table 8-20. Registers Associated with Timer RD Interrupt
Timer RD
Status
Register
Timer RD
Interrupt Enable
Register
Interrupt Request Flag
(Register)
Interrupt Mask Flag
(Register)
Priority Specification Flag
(Register)
Timer RD0 TRDSR0 TRDIER0 TRDIF0 (IF0H) TRDMK0 (MK0H) TRDPR00 (PR00H)
TRDPR10 (PR10H)
Timer RD1 TRDSR1 TRDIER1 TRDIF1 (IF0H) TRDMK1 (MK0H) TRDPR01 (PR00H)
TRDPR11 (PR10H)
Figure 8-62. Timer RD Interrupt Block Diagram
Since the interrupt source (timer RD interrupt) is generated by a combination of multiple interrupt request sources for
timer RD, the following differences from other maskable interrupts apply:
 When a bit in the TRDSRi register is 1 and the corresponding bit in the TRDIERi register is 1 (interrupt enabled),
the TRDIFi bit in the IF0H register is set to 1 (interrupt requested).
 If multiple bits in the TRDIERi register are set to 1, use the TRDSRi register to determine the source of the interrupt
request.
 Since the bits in the TRDSRi register are not automatically set to 0 even if the interrupt is acknowledged, set the
corresponding bit to 0 in the interrupt routine.
Use either (a) or (b) described below to clear each bit of the TRDSRi register.
(a) Set the TRDIERi register to 00H (disabling all interrupts) and then write 0 to all of the status flags.
(b) When at least one bit in the TRDIERi register has the setting 1 and the status flag of an interrupt source
enabled by the corresponding bit is 1, write 0 to all of the status flag bits whose settings are 1 in the TRDSRi
register.
Timer RDi
interrupt request
Timer RDi
IMFA bit
IMIEA bit
IMFB bit
IMIEB bit
IMFC bit
IMIEC bit
UDF bit
OVF bit
OVIE bit
i = 0 to 1
IMFA, IMFB, IMFC, IMFD, OVF, UDF : TRDSRi register bit
IMIEA, IMIEB, IMIEC, IMIED, OVIE : TRDIERi register bit
IMFD bit
IMIED bit

Renesas RL78/F14 Specifications

General

Brand	Renesas
Model	RL78/F14
Category	Computer Hardware
Language	English