R5F21294SNSP#U0 Renesas Electronics America, R5F21294SNSP#U0 Datasheet - Page 52

• Manufacturer Part Number: R5F21294SNSP#U0
• Description: MCU 3/5V 16K+2K 20PIN-SSOP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/R8C/Tiny/29r

Specifications of R5F21294SNSP#U0

• Core Processor: R8C
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, LIN, SIO, SSU, UART/USART
• Peripherals: LED, POR, Voltage Detect, WDT
• Number Of I /o: 13
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.2 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 20-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/28 Group, R8C/29 Group
Rev.2.10
REJ09B0279-0210
Figure 6.1
Table 6.2
VCC Monitor
Process
When Voltage
is Detected
Digital Filter
VCC
Sep 26, 2008
Item
Block Diagram of Voltage Detection Circuit (N, D Version)
Specifications of Voltage Detection Circuit (J, K Version)
Voltage to monitor
Detection target
Monitor
Reset
Interrupt
Switch
enabled/disabled
Sampling time
Internal
reference
voltage
Page 33 of 441
Vdet1
Whether passing through Vdet1
by rising or falling
None
Reset at Vdet1 > VCC;
restart CPU operation at VCC >
Vdet1
None
Available
(Divide-by-n of fOCO-S) × 4
n: 1, 2, 4, and 8
Voltage monitor 1 reset
VCA27
VCA26
VCA25
+
+
+
-
-
-
≥ Vdet2
≥ Vdet1
≥ Vdet0
Voltage Detection 1
Noise
Noise
filter
filter
Vdet2
Passing through Vdet2 by rising or falling
VCA13 bit in VCA1 register
Whether VCC is higher or lower than Vdet2
Voltage monitor 2 reset
Reset at Vdet2 > VCC; restart CPU operation
after a specified time
Voltage monitor 2 interrupt
Interrupt request at Vdet2 > VCC and VCC >
Vdet2 when digital filter is enabled;
interrupt request at Vdet2 > VCC or VCC >
Vdet2 when digital filter is disabled
Available
(Divide-by-n of fOCO-S) × 4
n: 1, 2, 4, and 8
Voltage Detection 2
6. Voltage Detection Circuit
VW1C register
VCA1 register
Voltage detection 2
signal
Voltage detection 1
signal
Voltage detection 0
signal
VW1C3 bit
VCA13 bit
b3
b3