R5F21191SP#U0 Renesas Electronics America, R5F21191SP#U0 Datasheet - Page 70

• Manufacturer Part Number: R5F21191SP#U0
• Description: IC R8C MCU FLASH 8K 20SSOP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/R8C/Tiny/19r

Specifications of R5F21191SP#U0

• Core Processor: R8C
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SIO, UART/USART
• Peripherals: LED, POR, Voltage Detect, WDT
• Number Of I /o: 13
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: FLASH
• Ram Size: 384 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 4x1b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 20-SSOP
• For Use With: R0K521134S000BE - KIT EVAL STARTER FOR R8C/13R0E521174CPE10 - EMULATOR COMPACT R8C/18/19/1
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/18 Group, R8C/19 Group
Rev.1.30
REJ09B0222-0130
10. Clock Generation Circuit
The clock generation circuit has:
Table 10.1 lists Specifications of Clock Generation Circuit. Figure 10.1 shows a Clock Generation Circuit.
Figures 9.2 to 10.5 show clock associated registers.
Table 10.1
NOTE:
Applications
Clock frequency
Connectable
oscillator
Oscillator
connect pins
Oscillation stop,
restart function
Oscillator status
after reset
Others
• Main clock oscillation circuit
• On-chip oscillator (oscillation stop detection function)
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 main clock oscillation circuit is not used.
Item
Apr 14, 2006
Specifications of Clock Generation Circuit
• CPU clock source
• Peripheral
0 to 20 MHz
• Ceramic
• Crystal oscillator
XIN, XOUT
Usable
Stop
Externally
generated clock
can be input
Oscillation Circuit
function clock
source
resonator
Main Clock
Page 53 of 233
(1)
• CPU clock source
• Peripheral function clock
• CPU and peripheral function
Approx. 8 MHz
−
(Note 1)
Usable
Stop
−
High-Speed On-Chip Oscillator
source
clock sources when main
clock stops oscillating
On-Chip Oscillator
• CPU clock source
• Peripheral function clock
• CPU and peripheral function
Approx. 125 kHz
−
(Note 1)
Usable
Oscillate
−
Low-Speed On-Chip Oscillator
source
clock sources when main
clock stops oscillating
10. Clock Generation Circuit