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R5F21143DSP View Datasheet(PDF) - Renesas Electronics

Part NameR5F21143DSP Renesas
Renesas Electronics Renesas
DescriptionR8C/14 Group, R8C/15 Group SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
R5F21143DSP Datasheet PDF : 277 Pages
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R8C/14 Group, R8C/15 Group
9. Clock Generation Circuit
9. Clock Generation Circuit
The MCU has two on-chip clock generation circuits:
• Main clock oscillation circuit
• On-chip oscillator (oscillation stop detection function)
Table 9.1 lists Specification of Clock Generation Circuit. Figure 9.1 shows a Clock Generation Circuit.
Figures 9.2 to 9.5 show clock-associated registers.
Table 9.1 Specification of Clock Generation Circuit
Item
Use of Clock
Clock Frequency
Connectable
Oscillator
Oscillator
Connect Pins
Oscillation Stop,
Restart Function
Oscillator Status
After Reset
Others
Main Clock
On-Chip Oscillator
Oscillation Circuit High-Speed On-Chip Oscillator Low-Speed On-Chip Oscillator
• CPU clock source • CPU clock source
• Peripheral
• Peripheral function clock
• CPU clock source
• Peripheral function clock
function clock
source
source
• CPU and peripheral function
clock sources when main
clock stops oscillating
source
• CPU and peripheral function
clock sources when main
clock stops oscillating
0 to 20MHz
Approx. 8MHz
Approx. 125kHz
• Ceramic
resonator
• Crystal oscillator
XIN, XOUT(1)
(Note 1)
(Note 1)
Usable
Usable
Usable
Stop
Stop
Oscillate
Externally
generated clock
can be input
NOTES:
1. This pin can be used as P4_6 and P4_7 when using the on-chip oscillator clock for a CPU clock
while the main clock oscillation circuit is not used.
Rev.2.10 Jan 19, 2006 Page 38 of 253
REJ09B0164-0210
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 Overview
This MCU is built using the high-performance silicon gate CMOS process using a R8C/Tiny Series CPU core and is packaged in a 20-pin plastic molded LSSOP. This MCU operates using sophisticated instructions featuring a high level of instruction efficiency. With 1 Mbyte of address space, it is capable of executing instructions at high speed. Furthermore, the data flash ROM (1KB × 2blocks) is embedded in the R8C/15 group.
The difference between R8C/14 and R8C/15 groups is only the existence of the data flash ROM. Their peripheral functions are the same.

 Applications
Electric household appliance, office equipment, housing equipment (sensor, security), general industrial equipment, audio, etc.

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