R5F211B1SP#U0 Renesas Electronics America, R5F211B1SP#U0 Datasheet - Page 137

• Manufacturer Part Number: R5F211B1SP#U0
• Description: IC R8C MCU FLASH 4K 20SSOP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/R8C/Tiny/1Br

Specifications of R5F211B1SP#U0

• Core Processor: R8C
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, SIO, SSU, UART/USART
• Peripherals: LED, POR, Voltage Detect, WDT
• Number Of I /o: 13
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: FLASH
• Ram Size: 384 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 20-SSOP
• For Use With: R0K5211B4S001BE - KIT STARTER FOR R8C/18191A1BR0K5211B4S000BE - KIT DEV EVALUATION R8C/1BR0E521174CPE10 - EMULATOR COMPACT R8C/18/19/1
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/1A Group, R8C/1B Group
Rev.1.30
REJ09B0252-0130
14.1.5
Table 14.6
NOTE:
Count sources
Count operations
Count start condition
Count stop condition
Interrupt request
generation timing
INT10/CNTR00,
INT11/CNTR01
pin functions
CNTR0 pin function
Read from timer
Write to timer
Select functions
1. Input a pulse with a period longer than twice of the prescaler X period. Input a pulse with a longer
In pulse period measurement mode, the pulse period of an external signal input to the INT1/CNTR0 pin is
measured (refer to Table 14.6 Pulse Period Measurement Mode Specifications). Figure 14.9 shows the
TXMR Register in Pulse Period Measurement Mode. Figure 14.10 shows an Operating Example in Pulse
Period Measurement Mode.
“H” and “L” width than the prescaler X period. If a pulse with a shorter period is input to the CNTR0
pin, the input may be ignored.
Dec 08, 2006
Pulse Period Measurement Mode
Item
Pulse Period Measurement Mode Specifications
Page 119 of 315
f1, f2, f8, fRING
• Decrement
• After an active edge of the measured pulse is input, contents for the read-out
1 (count starts) is written to the TXS bit in the TXMR register.
• When timer X underflows or reloads [timer X interrupt].
• Rising or falling of CNTR0 input (end of measurement period) [INT1 interrupt]
Measured pulse input
Programmable I/O port
The value retained in the read-out buffer is released by reading the TX
register.
• When registers TX and PREX are written during the count, the value is
• INT1/CNTR0 polarity switch function
• Measured pulse input pin select function
0 (count stops) is written to the TXS bit in the TXMR register.
Contents of the read-out buffer can be read out by reading the TX register.
• When registers TX and PREX are written while the count is stopped, values
buffer are retained at the first underflow of prescaler X. Then timer X reloads
contents in the reload register at the second underflow of prescaler X and
continues counting.
are written to both the reload register and counter.
written to each reload register of registers TX and PREX at the following
count source input, the data is transferred to the counter at the second count
source input, and the count re-starts at the third count source input.
The R0EDG bit can select the measurement period for the input pulse.
The CNTRSEL bit in the UCON register can select the CNTR00 or CNTR01
pin.
(1)
(INT1 interrupt input)
Specification
14. Timers