R5F21274JFP#U0 Renesas Electronics America, R5F21274JFP#U0 Datasheet - Page 98

MCU FLASH 2K FLASH 16K 32LQFP

R5F21274JFP#U0

Manufacturer Part Number
R5F21274JFP#U0
Description
MCU FLASH 2K FLASH 16K 32LQFP
Manufacturer
Renesas Electronics America
Series
R8C/2x/27r
Datasheet

Specifications of R5F21274JFP#U0

Core Processor
R8C
Core Size
16/32-Bit
Speed
20MHz
Connectivity
I²C, LIN, SIO, SSU, UART/USART
Peripherals
LED, POR, Voltage Detect, WDT
Number Of I /o
25
Program Memory Size
16KB (16K x 8)
Program Memory Type
FLASH
Ram Size
1K 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
32-LQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
R5F21274JFP#U0
Manufacturer:
Renesas Electronics America
Quantity:
10 000
R8C/26 Group, R8C/27 Group
Rev.2.10
REJ09B0278-0210
10. Clock Generation Circuit
The clock generation circuit has:
However, use one of the XIN clock oscillation circuit or the XCIN clock oscillation circuit because they share the
XIN/XCIN pin and the XOUT/XCOUT pin. (For J, K version, the XCIN clock oscillation circuit cannot be used.)
Table 10.1 lists the Specifications of Clock Generation Circuit. Figure 10.1 shows a Clock Generation Circuit. Figures
10.2 to 10.9 show clock associated registers. Figure 10.10 shows a Procedure for Enabling Reduced Internal Power
Consumption Using VCA20 bit.
Table 10.1
NOTES:
Applications
Clock frequency 0 to 20 MHz
Connectable
oscillator
Oscillator
connect pins
Oscillation stop,
restart function
Oscillator status
after reset
Others
• XIN clock oscillation circuit
• XCIN clock oscillation circuit (For N, D version only)
• Low-speed on-chip oscillator
• High-speed on-chip oscillator
1. These pins can be used as P4_6 or P4_7 when using the on-chip oscillator clock as the CPU clock while the
2. Set the CM01 bit in the CM0 register to 0 (XIN clock), the CM05 bit in the CM0 register to 1 (XIN clock stopped),
3. When 32.768 kHz is used as an external clock, set the CM01 bit in the CM0 register to 1 (XCIN clock). In other
4. Set the CM01 bit in the CM0 register to 1 (XCIN clock) and the CM04 bit in the CM0 register to 1 (XCIN clock
5. The clock frequency is automatically set to up to 20 MHz by a divider when using the high-speed on-chip
XIN clock oscillation circuit and XCIN clock oscillation circuit is not used.
and the CM13 bit in the CM1 register to 1 (XIN-XOUT pin) when an external clock is input.
cases, set the CM01 bit in the CM0 register to 0 (XIN clock).
oscillator) when an external clock is input.
oscillator as the CPU clock source.
Item
Sep 26, 2008
Specifications of Clock Generation Circuit
• Peripheral function
• Ceramic resonator
• Crystal oscillator
XIN, XOUT
Usable
Stop
• Externally
• On-chip feedback
• CPU clock source
XIN Clock Oscillation
clock source
generated clock can
be input
resistor RfXIN
(connected/ not
connected,
selectable)
Circuit
Page 79 of 453
(2, 3)
(1)
• CPU clock source
• Peripheral function
32.768 kHz
• Crystal oscillator
XCIN, XCOUT
Usable
Stop
• Externally generated
• On-chip feedback
(For N, D Version Only)
XCIN Clock Oscillation
clock source
clock can be input
resistor RfXCIN
(connected/ not
connected, selectable)
Circuit
(1)
(4)
• CPU clock source
• Peripheral function
• CPU and peripheral
Approx. 40 MHz
Usable
Stop
(1)
High-Speed On-Chip
clock source
function clock
sources when XIN
clock stops oscillating
Oscillator
On-Chip Oscillator
(5)
10. Clock Generation Circuit
• CPU clock source
• Peripheral function
• CPU and peripheral
Approx. 125 kHz
Usable
Oscillate
(1)
clock source
function clock
sources when XIN
clock stops oscillating
Low-Speed On-Chip
Oscillator

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