R5F21294SNSP#U0 Renesas Electronics America, R5F21294SNSP#U0 Datasheet - Page 204

• Manufacturer Part Number: R5F21294SNSP#U0
• Description: MCU 3/5V 16K+2K 20PIN-SSOP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/R8C/Tiny/29r

Specifications of R5F21294SNSP#U0

• Core Processor: R8C
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, LIN, SIO, SSU, UART/USART
• Peripherals: LED, POR, Voltage Detect, WDT
• Number Of I /o: 13
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.2 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 20-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/28 Group, R8C/29 Group
Rev.2.10
REJ09B0279-0210
Figure 14.37
14.3.3
Table 14.14
f1, f2, f4, f8, f32
fOCO40M
External signal input
to TRCCLK pin
14.3.3.1
Count Source
The method of selecting the count source is common to all modes.
Table 14.14 lists the Count Source Selection, and Figure 14.37 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 14.11 Timer RC Operation Clock).
To select fOCO40M 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).
fOCO40M
TRCCLK
Sep 26, 2008
Common Items for Multiple Modes
f32
f1
f2
f4
f8
Count Source
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) and bits
TCK2 to TCK0 in TRCCR1 register are set to 110b (fOCO40M)
Bits TCK2 to TCK0 in TRCCR1 register are set to 101b (count source is rising edge
of external clock) and PD3_3 bit in PD3 register is set to 0 (input mode)
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= 011b
= 010b
= 100b
= 101b
= 001b
TCK2 to TCK0
= 000b
= 110b
Selection Method
Count source
TRC register
14. Timers