R5F2121AJFP#U0 Renesas Electronics America, R5F2121AJFP#U0 Datasheet - Page 148

• Manufacturer Part Number: R5F2121AJFP#U0
• Description: MCU FLASH 96K 5K CMOS 48-LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/2x/21r

Specifications of R5F2121AJFP#U0

• Core Processor: R8C
• Core Size: 16/32-Bit
• Speed: 20MHz
• Connectivity: I²C, LIN, SIO, SSU, UART/USART
• Peripherals: POR, Voltage Detect, WDT
• Number Of I /o: 41
• Program Memory Size: 96KB (96K x 8)
• Program Memory Type: FLASH
• Ram Size: 5K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/20 Group, R8C/21 Group
Rev.2.00 Aug 27, 2008
REJ09B0250-0200
14.1.4
Table 14.5
Count Sources
Count Operations
Count Start Condition
Count Stop Conditions
Interrupt Request
Generation Timing
INT1/TRAIO Pin
Function
TRAO Pin Function
Read from Timer
Write to Timer
Select Functions
Pulse width measurement mode is mode to measure the pulse width of an external signal which inputs from the
INT1/TRAIO pin (see Table 14.5 Pulse Width Measurement Mode Specifications).
Figure 14.9 shows the TRAIOC Register in Pulse Width Measurement Mode and Figure 14.10 shows the
Operating Example of Pulse Width Measurement Mode.
Pulse Width Measurement Mode
Item
Pulse Width Measurement Mode Specifications
Page 130 of 458
f1, f2, f8, fOCO
• Decrement
• Continuously counts the selected signal only when measurement pulse is “H”
• When the timer underflows, the contents in the reload register is reloaded
Write 1 (count starts) to the TSTART bit in the TRACR register
• Write 0 (count stops) to the TSTART bit in the TRACR register
• Write 1 (count forcibly stops) to the TSTOP bit in the TRACR register
• When timer RA underflows [timer RA interrupt]
• Rising or falling of the TRAIO input (end of measurement period) [timer RA
Measurement pulse input (INT1 interrupt input)
Programmable I/O port
The count value can be read by reading the TRA and TRAPRE registers.
• When registers TRAPRE and TRA are written while the count is stopped,
• When registers TRAPRE and TRA are written during the count, values are
• Measurement level select
• Measurement pulse input pin select function
• Digital filter function
level, or conversely only “L” level.
and the count is inherited
interrupt]
values are written to both the reload register and counter.
written to the reload register and counter (refer to 14.1.1.1 Timer Write
Control during Count Operation).
The TEDGSEL bit in the TRAIOC register can select during “H” or “L” level
P1_7 or P1_5 is selected by the TIOSEL bit in the TRAIOC register.
Bits TIPF0 and TIPF1 in the TRAIOC register enable or disable the digital
filter and select the sampling frequency.
Specification
14. Timers