R5F21236KFP#U0 Renesas Electronics America, R5F21236KFP#U0 Datasheet - Page 167

• Manufacturer Part Number: R5F21236KFP#U0
• Description: IC R8C/23 MCU FLASH 48LQFP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/R8C/Tiny/23r

Specifications of R5F21236KFP#U0

• Core Processor: R8C
• Core Size: 16-Bit
• Speed: 16MHz
• Connectivity: CAN, I²C, LIN, SIO, SSU, UART/USART
• Peripherals: POR, Voltage Detect, WDT
• Number Of I /o: 41
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 48-LQFP
• For Use With: RCDK8C - KIT DEV EVAL FOR CAN R8C/23R0E521237CPE00 - EMULATOR COMPACT R8C/20/21/22/23
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/22 Group, R8C/23 Group
Rev.2.00 Aug 20, 2008
REJ09B0251-0200
Figure 14.12
Underflow signal of timer
Conditions: A period from one rising edge to the next rising edge of measurement pulse is measured (TEDGSEL = 0) with
NOTES:
1. The contents of the read-out buffer can be read when the TRA register is read in pulse period measurement mode.
2. After an active edge of measurement pulse is input, the TEDGF bit in the TRACR register is set to 1 (active edge found) when the timer RA
3. The TRA register should be read before the next active edge is input after the TEDGF bit is set to 1 (active edge found).
4. When set to 0 by a program, use a MOV instruction to write 0 to the TEDGF bit in the TRACR register. At the same time, write 1 to the
5. When set to 0 by a program, use a MOV instruction to write 0 to the TUNDF bit. At the same time, write 1 to the TEDGF bit.
6. The TUNDF and TEDGF bits are both set to 1 if the timer RA underflows and reloads on an active edge simultaneously.
Contents of read-out
Measurement pulse
prescaler underflows for the second time.
The content in the read-out buffer is retained until the TRA register is read. If the TRA register is not read before the next active edge is
input, the measured result of the previous period is retained.
TUNDF bit in the TRACR register.
(TRAIO pin input)
Contents of TRA
TRACR register
TRACR register
TRACR register
IR bit in TRAIC
TSTART bit in
RA prescaler
TEDGF bit in
TUNDF bit in
the default value of the TRA register as 0Fh.
buffer
register
Operating Example of Pulse Period Measurement Mode
(1)
1
0
1
0
1
0
1
0
1
0
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Starts counting
Set to 1 by program
0Fh
0Fh
0Eh 0Dh 0Fh 0Eh 0Dh 0Ch 0Bh 0Ah 09h 0Fh 0Eh 0Dh
0Eh
Retained
(2)
TRA reloads
0Dh
TRA read
Set to 0 when interrupt request is acknowledged, or set by program
Set to 0 by program
(3)
0Bh 0Ah
Retained
(2)
TRA reloads
(4)
09h
0Dh
Set to 0 by program
01h 00h 0Fh 0Eh
01h 00h 0Fh 0 E h
(6)
14. Timers
(5)