R5F21257SNFP#U0 Renesas Electronics America, R5F21257SNFP#U0 Datasheet - Page 173

• Manufacturer Part Number: R5F21257SNFP#U0
• Description: IC R8C/25 MCU FLASH 52LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/2x/25r

Specifications of R5F21257SNFP#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: 48KB (48K x 8)
• Program Memory Type: FLASH
• Ram Size: 2.5K x 8
• Voltage - Supply (vcc/vdd): 2.2 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 52-LQFP
• For Use With: R0K521256S000BE - KIT EVAL STARTER FOR R8C/25
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/24 Group, R8C/25 Group
Rev.3.00
REJ09B0244-0300
Figure 14.16
14.2.1
Table 14.7
Count sources
Count operations
Divide ratio
Count start condition
Count stop conditions
Interrupt request
generation timing
TRBO pin function
INT0 pin function
Read from timer
Write to timer
Timer RB I/O Control Register
b7 b6 b5 b4 b3 b2
In timer mode, a count source which is internally generated or timer RA underflows are counted (refer to Table
14.7 Timer Mode Specifications). Registers TRBOCR and TRBSC are not used in timer mode.
Figure 14.16 shows the TRBIOC Register in Timer Mode.
Feb 29, 2008
Item
Timer Mode
0 0
Timer Mode Specifications
TRBIOC Register in Timer Mode
b1 b0
0 0
Bit Symbol
INOSTG
INOSEG
TRBIOC
(b7-b4)
Symbol
TOCNT
TOPL
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f1, f2, f8, timer RA underflow
• Decrement
• When the timer underflows, it reloads the reload register contents before the
1/(n+1)(m+1)
n: setting value in TRBPRE register, m: setting value in TRBPR register
1 (count starts) is written to the TSTART bit in the TRBCR register.
• 0 (count stops) is written to the TSTART bit in the TRBCR register.
• 1 (count forcibly stops) is written to the TSTOP bit in the TRBCR register.
When timer RB underflows [timer RB interrupt].
Programmable I/O port
Programmable I/O port or INT0 interrupt input
The count value can be read out by reading registers TRBPR and TRBPRE.
• When registers TRBPRE and TRBPR are written while the count is stopped,
• When registers TRBPRE and TRBPR are written to while count operation is in
count continues (when timer RB underflows, the contents of timer RB primary
reload register is reloaded).
values are written to both the reload register and counter.
progress:
If the TWRC bit in the TRBMR register is set to 0, the value is written to both
the reload register and the counter.
If the TWRC bit is set to 1, the value is written to the reload register only.
(Refer to 14.2.1.1 Timer Write Control during Count Operation.)
Timer RB output level select
bit
Timer RB output sw itch bit
One-shot trigger control bit
One-shot trigger polarity
select bit
Nothing is assigned. If necessary, set to 0.
When read, the content is 0.
Address
Bit Name
010Ah
Set to 0 in timer mode.
Specification
After Reset
Function
00h
14. Timers
RW
RW
RW
RW
RW
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