R5F21294SNSP#U0 Renesas Electronics America, R5F21294SNSP#U0 Datasheet - Page 155

• 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
14.1
Figure 14.1
INT1/TRAIO (P1_7) pin
INT1/TRAIO (P1_5) pin
Timer RA is an 8-bit timer with an 8-bit prescaler.
The prescaler and timer each consist of a reload register and counter. The reload register and counter are allocated
at the same address, and can be accessed when accessing registers TRAPRE and TRA (refer to Tables 14.2 to 14.6
the Specifications of Each Mode).
The count source for timer RA is the operating clock that regulates the timing of timer operations such as counting
and reloading.
Figure 14.1 shows a Block Diagram of Timer RA. Figures 14.2 and 14.3 show the registers associated with timer
RA.
Timer RA has the following five operating modes:
• Timer mode:
• Pulse output mode:
• Event counter mode:
• Pulse width measurement mode:
• Pulse period measurement mode:
TCK2 to TCK0 bit
fC32
fOCO
Timer RA
Sep 26, 2008
f1
f8
f2
(1)
NOTE:
= 000b
= 001b
= 010b
= 011b
= 100b
1. For J, K version, fC32 cannot be selected.
TRAO pin
TIOSEL = 0
TIOSEL = 1
Block Diagram of Timer RA
f32
f1
f8
TIPF1 to TIPF0 bits
= 01b
= 10b
= 11b
TIPF1 to TIPF0 bits
= other than
000b
= 00b
TOENA bit
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Digital
filter
TMOD2 to TMOD0
TMOD2 to TMOD0
switching
= other than 010b
Polarity
= 010b
The timer counts the internal count source.
The timer counts the internal count source and outputs pulses which
invert the polarity by underflow of the timer.
The timer counts external pulses.
The timer measures the pulse width of an external pulse.
The timer measures the pulse period of an external pulse.
TMOD2 to TMOD0 = 001b
TOPCR bit
TCKCUT
TMOD2 to TMOD0
bit
= 011b or 100b
TCSTF, TSTOP: Bits in TRACR register
TEDGSEL, TOPCR, TOENA, TIOSEL, TIPF1, TIPF0: Bits in TRAIOC register
TMOD2 to TMOD0, TCK2 to TCK0, TCKCUT: Bits in TRAMR register
TCSTF
bit
TEDGSEL = 1
TEDGSEL = 0
Count control
TRAPRE register
register
circle
Reload
(prescaler)
Counter
Q
Q
Data bus
Measurement completion
flip-flop
Toggle
CLR
register
signal
Reload
TRA register
CK
Counter
(timer)
Write to TRAMR register
Write 1 to TSTOP bit
Underflow signal
Timer RA interrupt
14. Timers