r5f21346mnfp Renesas Electronics Corporation., r5f21346mnfp Datasheet - Page 294

• Manufacturer Part Number: r5f21346mnfp
• Description: Single-chip Mcus Incorporates The R8c Cpu Core
• Manufacturer: Renesas Electronics Corporation.

R8C/34M Group
R01UH0131EJ0100 Rev.1.00
Jun 21, 2011
19.3
Figure 19.2
19.3.1
Table 19.5
f1, f2, f4, f8, f32
fOCO40M
fOCO-F
External signal input
to TRCCLK pin
Count Source
The method of selecting the count source is common to all modes.
Table 19.5 lists the Count Source Selection, and Figure 19.2 shows a Count Source Block Diagram.
The pulse width of the external clock input to the TRCCLK pin should be three cycles or more of the timer RC
operation clock (refer to Table 19.1 Timer RC Operation Clocks).
To select fOCO40M or fOCO-F as the count source, set the FRA00 bit in the FRA0 register set to 1 (high-speed
on-chip oscillator on), and then set bits TCK2 to TCK0 in the TRCCR1 register to 110b (fOCO40M) or 111b
(fOCO-F).
fOCO40M
TRCCLK
Common Items for Multiple Modes
fOCO-F
Count Source
f32
f1
f2
f4
f8
Count Source Selection
Count Source Block Diagram
TCK2 to TCK0: Bits in TRCCR1 register
Count source selected using bits TCK2 to TCK0 in TRCCR1 register
FRA00 bit in FRA0 register set to 1 (high-speed on-chip oscillator on)
Bits TCK2 to TCK0 in TRCCR1 register are set to 110b (fOCO40M)
Bits TCK2 to TCK0 in TRCCR1 register are set to 111b (fOCO-F)
Bits TCK2 to TCK0 in TRCCR1 register are set to 101b (count source is rising edge
of external clock) and the corresponding direction bit in the corresponding direction
register is set is set to 0 (input mode)
= 011b
= 100b
= 010b
= 101b
TCK2 to TCK0
= 001b
= 110b
= 000b
Selection Method
= 111b
Count source
TRC register
Page 262 of 740
19. Timer RC