R5F21257SNFP#U0 Renesas Electronics America, R5F21257SNFP#U0 Datasheet - Page 33

• 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
REJ03B0117-0300
Figure 5.3
Table 5.9
NOTES:
V
V
t
rth
reset signal
Power V
por1
por2
NOTES:
Symbol
(“L” valid)
1. The measurement condition is T
2. This condition (external power V
3. To use the power-on reset function, enable voltage monitor 0 reset by setting the LVD0ON bit in the OFS register to 0, the
4. t
External
Internal
1. When using the voltage monitor 0 digital filter, ensure that the voltage is within the MCU operation voltage
2. The sampling clock can be selected. Refer to 6. Voltage Detection Circuit of Hardware Manual for details.
3. V
V
V
VW0C0 and VW0C6 bits in the VW0C register to 1 respectively, and the VCA25 bit in the VCA2 register to 1.
reset. When turning on the power for the first time, maintain t
3,000 s or more if -40°C ≤ T
w(por1)
det0
por1
range (2.2 V or above) during the sampling time.
Circuit of Hardware Manual for details.
Feb 29, 2008
CC
det0
(3)
indicates the duration the external power V
Power-on reset valid voltage
Power-on reset or voltage monitor 0 reset valid
voltage
External power V
indicates the voltage detection level of the voltage detection 0 circuit. Refer to 6. Voltage Detection
Power-on Reset Circuit, Voltage Monitor 0 Reset Electrical Characteristics
Power-on Reset Circuit Electrical Characteristics
t
w(por1)
Page 31 of 51
CC
Parameter
rise gradient
t
opr
rth
< -20°C.
opr
CC
= -20 to 85°C (N version) / -40 to 85°C (D version), unless otherwise specified.
rise gradient) does not apply if V
(4)
(2)
f
OCO-S
1
CC
Sampling time
× 32
must be held below the effective voltage (V
w(por1)
Condition
for 30 s or more if -20°C ≤ T
(1, 2)
CC
≥ 1.0 V.
2.2 V
t
rth
Min.
20
−
0
5. Electrical Characteristics
Standard
opr
Typ.
f
≤ 85°C, maintain t
OCO-S
por1
−
−
−
V
1
por2
) to enable a power on
× 32
Max.
V
0.1
det0
−
V
(3)
det0
(3)
mV/msec
w(por1)
Unit
V
V
for