R5F21346CNFP#U0 Renesas Electronics America, R5F21346CNFP#U0 Datasheet - Page 147
R5F21346CNFP#U0
Manufacturer Part Number
R5F21346CNFP#U0
Description
MCU 1KB FLASH 32K ROM 48-LQFP
Manufacturer
Renesas Electronics America
Series
R8C/3x/34Cr
Datasheet
1.R5F21346CNFPU0.pdf
(759 pages)
Specifications of R5F21346CNFP#U0
Core Processor
R8C
Core Size
16/32-Bit
Speed
20MHz
Connectivity
I²C, LIN, SIO, SSU, UART/USART
Peripherals
POR, PWM, Voltage Detect, WDT
Number Of I /o
43
Program Memory Size
32KB (32K x 8)
Program Memory Type
FLASH
Ram Size
2.5K x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Data Converters
A/D 12x10b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 85°C
Package / Case
48-LQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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R8C/34C Group
REJ09B0586-0100 Rev.1.00 Jan 13, 2010
Page 114 of 723
9.
The following five circuits are incorporated in the clock generation circuit:
• XIN clock oscillation circuit
• XCIN clock oscillation circuit
• Low-speed on-chip oscillator
• High-speed on-chip oscillator
• Low-speed on-chip oscillator for watchdog timer
9.1
Table 9.1
Notes:
Applications
Clock frequency 0 to 20 MHz
Connectable
oscillator
Oscillator
connect pins
Oscillation stop,
restart function
Oscillator status
after reset
Others
Table 9.1 lists the Specification Overview of Clock Generation Circuit. Figure 9.1 shows a Clock Generation
Circuit, Figure 9.2 shows a Peripheral Function Clock and Figure 9.3 shows a Procedure for Reducing Internal
Power Consumption Using VCA20 bit.
Clock Generation Circuit
1. These pins can be used as P4_6 and P4_7 when using the XCIN clock oscillation circuit or on-chip oscillator
2. These pins can be used as P4_3 and P4_4 when using the XIN clock oscillation circuit or on-chip oscillator
3. To input an external clock, set the CM05 bit in the CM0 register to 1 (XIN clock stops), the CM11 bit in the CM1
4. The clock frequency is automatically set to up to 20 MHz by a divider when using the high-speed on-chip
5. This applies when the CSPROINI bit in the OFS register is set to 1 (count source protection mode disabled after reset).
6. This applies when the CSPROINI bit in the OFS register is set to 0 (count source protection mode enabled after reset).
Item
clock as the CPU clock while the XIN clock oscillation circuit is not used.
clock as the CPU clock while the XCIN clock oscillation circuit is not used.
register to 1 (internal feedback resistor disabled), and the CM13 bit to 1 (XIN-XOUT pin).
oscillator as the CPU clock source.
Overview
Specification Overview of Clock Generation Circuit
Oscillation Circuit
• CPU clock
• Peripheral
• Ceramic
• Crystal
XIN, XOUT
Usable
Stop
Externally
generated clock
can be input
source
function clock
source
resonator
oscillator
XIN Clock
(1)
(3)
• CPU clock
• Peripheral
32.768 kHz
• Crystal
XCIN, XCOUT
Usable
Stop
• Externally
• On-chip
Oscillation Circuit
source
function clock
source
oscillator
generated clock
can be input
feedback resistor
Rf (connected/
not connected
selectable)
XCIN Clock
(2)
On-Chip Oscillator
• CPU clock
• Peripheral
• CPU and
Approx. 40 MHz
−
−
Usable
Stop
−
source
function clock
source
peripheral function
clock source when
XIN clock stops
oscillating
(1)
High-Speed
On-Chip Oscillator
(4)
• CPU clock
• Peripheral
• CPU and
Approx. 125 kHz
−
−
Usable
Oscillate
−
On-Chip Oscillator
source
function clock
source
peripheral function
clock source when
XIN clock stops
oscillating
(1)
Low-Speed
9. Clock Generation Circuit
• Watchdog timer
Approx. 125 kHz
−
−
Usable
Stop
Oscillate
−
Chip Oscillator for
clock source
Watchdog Timer
Low-Speed On-
(5)
(6)
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