R5F363AENFA#U0 Renesas Electronics America, R5F363AENFA#U0 Datasheet - Page 832

• Manufacturer Part Number: R5F363AENFA#U0
• Description: MCU 4KB FLASH 256/16K 100-QFP
• Manufacturer: Renesas Electronics America
• Series: M16C/60/63r

Specifications of R5F363AENFA#U0

• Core Processor: M16C/60
• Core Size: 16/32-Bit
• Speed: 20MHz
• Connectivity: EBI/EMI, I²C, SIO, UART/USART
• Peripherals: DMA, LVD, POR, PWM, WDT
• Number Of I /o: 85
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 20K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 26x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 100-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

M16C/63 Group
REJ09B0510-0100 Rev.1.00 Sep 15, 2009
Page 794 of 836
32.6
32.6.1
Table 32.2
Figure 32.3
The following items should be observed when connecting an oscillator:
The procedure for outputting a clock from the CLKOUT pin is listed below. Set the clock output from the
CLKOUT pin to f(BCLK) or lower.
Outputting the main clock
Outputting the sub clock
PCLKR register
PCLK5 bit
•
•
•
(1) Set the PRC0 bit in the PRCR register to 1 (write enabled).
(2) Set the CM07 bit in the CM0 register, and the CM21 bit in the CM2 register all to 0 (main clock
(3) Select the clock output from the CLKOUT pin (see the table below).
(4) Set the PRC0 bit in the PRCR register to 0 (write disabled).
(1) Set the PRC0 bit in the PRCR register to 1 (write enabled).
(2) Set the CM07 bit in the CM0 register to 1 (sub clock selected).
(3) Set the PCLK5 bit in the PCLKR register to 0, and bits CM01 to CM00 in the CM0 register to 01b
(4) Set the PRC0 bit in the PRCR register to 0 (write disabled).
Notes on Clock Generator
The oscillation characteristics are tied closely to the user’s board design. Perform a careful evalua-
tion of the board before connecting an oscillator.
Oscillation circuit structure depends on the oscillator. The M16C/63 Group MCU contains a feed-
back resistor, but an additional external feedback resistor may be required. Contact the oscillator
manufacturer regarding circuit constants, as they are dependent on the oscillator or stray capaci-
tance of the mounted circuit.
Check output from the CLKOUT pin to confirm that the clock generated by the oscillation circuit is
properly transmitted to the MCU.
Oscillation Circuit Using an Oscillator
selected).
(fC output from CLKOUT pin).
1
0
0
Output from CLKOUT Pin When Selecting Main Clock
Oscillation Circuit Example
Bit Setting
Bits CM01 to CM00
MCU
CM0 register
XOUT
00b
10b
11b
VSS
XIN
damping resistor
feedback
resistor
Clock with the same frequency as the main clock
Rd
Rf
Output from the CLKOUT Pin
Main clock divided by 32
Ceramic resonator
or crystal
Main clock divided by 8
COUT
CIN
32. Usage Notes