R5F21257SNFP#U0 Renesas Electronics America, R5F21257SNFP#U0 Datasheet - Page 156

• 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 14.4
14.1.1
Table 14.2
Count sources
Count operations
Divide ratio
Count start condition
Count stop conditions
Interrupt request
generation timing
INT1/TRAIO pin
function
TRAO pin function
Read from timer
Write to timer
Timer RA I/O Control Register
b7 b6 b5 b4 b3 b2
In this mode, the timer counts an internally generated count source (refer to Table 14.2 Timer Mode
Specifications).
Figure 14.4 shows the TRAIOC Register in Timer Mode.
0 0
Feb 29, 2008
Item
Timer Mode
0
Timer Mode Specifications
TRAIOC Register in Timer Mode
b1 b0
0
0
Bit Symbol
TEDGSEL
TRAIOC
TOENA
TIOSEL
(b7-b6)
Symbol
TOPCR
TIPF0
TIPF1
Page 137 of 485
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f1, f2, f8, fOCO, fC32
• Decrement
• When the timer underflows, the contents of the reload register are reloaded
n: Value set in TRAPRE register, m: Value set in TRA register
1 (count starts) is written to the TSTART bit in the TRACR register.
• 1 (count forcibly stops) is written to the TSTOP bit in the TRACR register.
When timer RA underflows [timer RA interrupt].
Programmable I/O port, or INT1 interrupt input
Programmable I/O port
The count value can be read by reading registers TRA and TRAPRE.
• When registers TRAPRE and TRA are written during the count, values are
1/(n+1)(m+1)
• 0 (count stops) is written to the TSTART bit in the TRACR register.
• When registers TRAPRE and TRA are written while the count is stopped,
and the count is continued.
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).
TRAIO polarity sw itch bit
TRAIO output control bit
TRAO output enable bit
_____
INT1
TRAIO input filter select bits Set to 0 in timer mode.
Nothing is assigned. If necessary, set to 0.
When read, the content is 0.
/TRAIO select bit
Address
Bit Name
0101h
Set to 0 in timer mode.
0 : INT1
1 : INT1
_____
_____
Specification
/TRAIO pin (P1_7)
/TRAIO pin (P1_5)
After Reset
Function
00h
14. Timers
RW
RW
RW
RW
RW
RW
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