R5F21256SNFP#ES Renesas Electronics America, R5F21256SNFP#ES Datasheet - Page 54
R5F21256SNFP#ES
Manufacturer Part Number
R5F21256SNFP#ES
Description
MCU 2/5V 32K 52-LQFP ES SAMPLE
Manufacturer
Renesas Electronics America
Series
R8C/2x/25r
Specifications of R5F21256SNFP#ES
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
32KB (32K x 8)
Program Memory Type
FLASH
Ram Size
2K 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
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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R8C/24 Group, R8C/25 Group
Rev.3.00
REJ09B0244-0300
Figure 6.3
Figure 6.4
Internal
reference
voltage
Internal
reference
voltage
Voltage detection 2 circuit
Watchdog timer block
Voltage detection 1 circuit
VCC
VCC
VW1C0 to VW1C3, VW1F0, VW1F1, VW1C6, VW1C7: Bits in VW1C register
VCA26: Bit in VCA2 register
VW2C0 to VW2C3, VW2F0, VW2F1, VW2C6, VW2C7: Bits in VW2C register
VCA13: Bit in VCA1 register
VCA27: Bit in VCA2 register
VCA27
+
VCA26
+
-
-
(Filter width: 200 ns)
Feb 29, 2008
(Filter width: 200 ns)
Noise filter
Noise filter
Block Diagram of Voltage Monitor 1 Interrupt/Reset Generation Circuit
Block Diagram of Voltage Monitor 2 Interrupt/Reset Generation Circuit
Watchdog timer
underflow signal
Voltage detection 2 signal
is held “H” when VCA27 bit
is set to 0 (disabled)
Voltage detection 1 signal
is held “H” when VCA26 bit
is set to 0 (disabled)
Page 35 of 485
fOCO-S
fOCO-S
Voltage
detection
2 signal
Voltage
detection
1 signal
VCA13
Voltage monitor 1 interrupt/reset generation circuit
Voltage monitor 2 interrupt/reset generation circuit
This bit is set to 0 (not detected) by writing 0
by a program.
VW1C3
VW2C3
1/2
1/2
1/2
1/2
VW2F1 to VW2F0
VW1F1 to VW1F0
1/2
1/2
VW1C7
VW2C7
= 00b
= 01b
= 10b
= 11b
= 00b
= 01b
= 10b
= 11b
VW2C1
VW1C1
Digital
filter
Digital
filter
VW2C2 bit is set to 0 (not detected) by
writing 0 by a program.
When VCA27 bit is set to 0 (voltage
detection 2 circuit disabled), VW2C2
bit is set to 0
VW1C2 bit is set to 0 (not detected) by
writing 0 by a program.
When VCA26 bit is set to 0 (voltage
detection 1 circuit disabled), VW1C2
bit is set to 0
VW1C1
VW2C1
VW2C0
VW1C0
VW1C6
VW2C6
VW1C2
VW2C2
6. Voltage Detection Circuit
Voltage monitor 1
interrupt signal
Oscillation stop
Voltage monitor 2
interrupt signal
Oscillation stop
timer interrupt
interrupt signal
timer interrupt
interrupt signal
Watchdog
Watchdog
detection
detection
signal
signal
Voltage monitor 2
reset signal
Voltage monitor 1
reset signal
Non-maskable
interrupt signal
Non-maskable
interrupt signal
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