R5F2L3AAANFP#U1 Renesas Electronics America, R5F2L3AAANFP#U1 Datasheet - Page 154

• Manufacturer Part Number: R5F2L3AAANFP#U1
• Description: MCU FLASH 96+4KB 100LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/Lx/3AAr

Specifications of R5F2L3AAANFP#U1

• Core Processor: R8C
• Core Size: 16/32-Bit
• Speed: 20MHz
• Connectivity: I²C, LIN, SIO, SSU, UART/USART
• Peripherals: LCD, POR, PWM, Voltage Detect, WDT
• Number Of I /o: 88
• Program Memory Size: 96KB (96K x 8)
• Program Memory Type: FLASH
• Ram Size: 10K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 20x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 100-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/L35A Group, R8C/L36A Group, R8C/L38A Group, R8C/L3AA Group,
R8C/L35B Group, R8C/L36B Group, R8C/L38B Group, R8C/L3AB Group
REJ09B0441-0100 Rev.1.00
Page 117 of 802
8.5
Figure 8.4
The XCIN clock is supplied by the XCIN clock oscillation circuit. This clock is used as the clock source for the
CPU and peripheral function clocks. The XCIN clock oscillation circuit is configured by connecting a crystal
oscillator between pins XCIN and XCOUT. The XCIN clock oscillation circuit includes an on-chip a feedback
resistor, which is disconnected from the oscillation circuit in stop mode in order to reduce the amount of power
consumed by the chip. The XCIN clock oscillation circuit may also be configured by feeding an externally
generated clock to the XCIN pin.
Figure 8.4 shows Examples of XCIN Clock Connection Circuits.
Bits CM04 to CM03 in the CM0 register are set to 00b (external clock input disabled, XCIN clock oscillates) by
reset and the XCIN clock starts oscillating (with the on-chip feedback resistor enabled). After the XCIN clock
oscillation stabilizes following reset, the XCIN clock is used as the CPU clock source by setting the CM07 bit in
the CM07 register to 1 (XCIN clock).
When the CM03 bit is set to 1 (XCIN clock stops), the XCIN clock stops.
When bits CM04 to CM03 are set to 10b (external clock input enabled, XCIN clock oscillates), an externally
generated clock can also be input to the XCIN pin. Leave the XCOUT pin open at this time.
This MCU has an on-chip feedback resistor, which can be disabled/enabled by the CM12 bit in the CM1 register.
To use the XCIN clock, set the CM03 bit to 1 once and then set it to 0 (XCIN clock oscillates).
To use the VL1 internally-generated voltage in the LCD drive control circuit, set the LVURS bit in the LCR1
register to 1 (VL1 internally-generated voltage) after the above setting. When the XCIN clock is not used, set bits
CM04 to CM03 to 01b (external clock input disabled, XCIN clock stops) and the CM12 bit to 1 (on-chip feedback
resistor disabled).
In stop mode, all clocks including the XCIN clock stop. Refer to 9. Power Control for details.
• When CM03 bit in CM0 register is 0 (XCIN clock oscillates)
and CM04 bit is 0 (external clock input disabled)
XCIN Clock
Note:
1. Insert a damping resistor and a feedback resistor if required. The resistance will vary depending on the
External crystal oscillator circuit
crystal oscillator and the oscillation drive capacity settings. Use the value recommended by the crystal
oscillator manufacturer.
externally, insert a feedback resistor between XCIN and XCOUT following the instructions.
If the crystal oscillator manufacturer's datasheet specifies that a feedback resistor be added to the chip
Examples of XCIN Clock Connection Circuits
XCIN
(on-chip feedback resistor)
CIN
MCU
Rf
Oct 30, 2009
(1)
XCOUT
Rd
COUT
(1)
• When CM03 bit in CM0 register is 1 (XCIN clock stops)
and CM04 bit is 1 (external clock input enabled)
VCC
VSS
XCIN
Externally generated clock
External clock input circuit
(on-chip feedback resistor)
MCU
8. Clock Generation Circuit
XCOUT
Open