Renesas RX Series User Manual

R01UH0823EJ0100 Rev.1.00 Page 170 of 1823
Jul 31, 2019
RX23W Group 9. Clock Generation Circuit
Figure 9.1 Block Diagram of Clock Generation Circuit
EXTAL
XTAL
SCKCR
ICK[3:0]
System clock (ICLK)
To CPU, DMAC, DTC, ROM,
and RAM
Peripheral module clock
(PCLKA, PCLKB, PCLKD)
To peripheral module
SCKCR
XCOUT
XCIN
Sub-clock
IWDT-dedicated low-speed clock
RTC-dedicated clock
To RTC
IWDT-dedicated clock
To IWDT
PLL
circuit
Frequency
divider
FCK[3:0]
FlashIF clock (FCLK)
To FlashIF
SCKCR
CKSEL[2:0]
SCKCR3
HOCO clock
LOCO clock
Main clock
Frequency
divider
PLIDIV[1:0]
PLLCR
STC[5:0]
PLLCR
PCKA[3:0], PCKB[3:0],
PCKD[3:0]
High-speed
on-chip oscillator
Low-speed
on-chip oscillator
1/1
CAC clock
To CAC
(CACILCLK)
(CACLCLK)
(CACHCLK)
(CACSCLK)
(CACMCLK)
1/2
1/4
1/8
1/16
1/32
1/64
USB clock (UCLK)
To USB
CKOSEL[2:0]
CKOCR
CLKOUT pin
1/1
1/2
1/4
1/8
1/16
Frequency
divider
IWDT-dedicated
on-chip oscillator
CKODIV[2:0]
CKOCR
PLL
circuit
Frequency
divider
UPLIDIV[1:0]
UPLLCR
USTC[5:0]
UPLLCR
UPLLCR
LPCNTCKSEL
LPTCR1
Low power timer clock (LPTCLK)
To low power timer
SSI clock (SSISCK)
To SSI
UCKUPLLSEL
CAN clock
To RSCAN
(CANMCLK)
Wait
control
MSTS[4:0]
MOSCWTCR
Selector
Selector
Selector
SelectorSelector
Selector
Selector
Sub-clock
oscillator
Main clock
oscillator
XTAL2_RF
XTAL1_RF
Dedicated clock for Bluetooth
CLKOUT_RF pin
Bluetooth-dedicated
low speed on-chip
oscillator
Bluetooth-dedicated clock (BLECLK)
To BLE
Bluetooth-dedicated low-speed clock (BLELOCO)
To BLE
Frequency
divider
Bluetooth-dedicated low speed clock
(RTCSCLK)
(IWDTCLK)
Dedicated clock
oscillator for
Bluetooth
Specified from Bluetooth middleware
1/8
1/16
1/32

Renesas RX Series Specifications

General

Core	RXv1, RXv2, RXv3
Flash Memory	Up to 8 MB
RAM	Up to 1 MB
Operating Voltage	1.62V to 5.5V
Operating Temperature	-40°C to +85°C or +105°C
Package	BGA, LQFP
ADC Resolution	12-bit
DAC Resolution	12-bit
Communication Interfaces	SCI, SPI, I2C, USB, Ethernet, CAN
Architecture	32-bit
Security Features	Memory Protection Unit (MPU)