R5F2121AJFP#U0 Renesas Electronics America, R5F2121AJFP#U0 Datasheet - Page 390

• Manufacturer Part Number: R5F2121AJFP#U0
• Description: MCU FLASH 96K 5K CMOS 48-LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/2x/21r

Specifications of R5F2121AJFP#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: 96KB (96K x 8)
• Program Memory Type: FLASH
• Ram Size: 5K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/20 Group, R8C/21 Group
Rev.2.00 Aug 27, 2008
REJ09B0250-0200
18.5
Figure 18.10
Parasitic Diode
Parasitic Diode
Figure 18.10 shows the Internal Equivalent Circuit of Analog Input.
AN0
Control signal
for SW2
Control signal
for SW3
Internal Equivalent Circuit of Analog Input
NOTE:
VREF
AVSS
i = 12
AN11
1. Use only as a standard for designing this data.
VCC
VSS
Mass production may cause some changes in device characteristics.
A/D Control Register 0
Internal Equivalent Circuit of Analog Input
Comparison reference voltage
b4
ON Resistor
Approx. 2k Ω Wiring Resistor
ON Resistor
Approx. 2k Ω Wiring Resistor
VCC VSS
b2
SW1
SW1
i Ladder-type
Switches
(Vref) generator
b1
Page 372 of 458
C onnect to
C onnect to
Sampling C om parison
b0
Approx. 0.2k Ω
Approx. 0.2k Ω
Resistor
ladder
C onnect to
C onnect to
i Ladder-type
Wiring Resistors
ON Resistor
Approx. 0.6k Ω
ON Resistor
Approx. 0.6k f
Control Signal
Control Signal
SW2
Reference
Sampling
SW5
SW1 conducts only on the ports selected for analog input.
SW2 and SW3 are open when A/D conversion is not in progress;
their status varies as shown by the waveforms in the diagrams on the left.
SW4 conducts only when A/D conversion is not in progress.
SW5 conducts when A/D conversion is Comparison.
VIN
Vref
Comparison
Analog Input
voltage
Voltage
C = Approx.1.5pF
SW4
AVSS
AVCC
Conversion Register
ON Resistor
Approx. 5k Ω
A/D Successive
Chopper-type
SW3
AMP
Amplifier
Interrupt Request
A/D Conversion
18. A/D Converter