R5F211B1SP#U0 Renesas Electronics America, R5F211B1SP#U0 Datasheet - Page 87
R5F211B1SP#U0
Manufacturer Part Number
R5F211B1SP#U0
Description
IC R8C MCU FLASH 4K 20SSOP
Manufacturer
Renesas Electronics America
Series
M16C™ M16C/R8C/Tiny/1Br
Datasheets
1.R5F211A2SPU0.pdf
(51 pages)
2.R5F211A2SPU0.pdf
(300 pages)
3.R5F211A2SPU0.pdf
(341 pages)
Specifications of R5F211B1SP#U0
Core Processor
R8C
Core Size
16-Bit
Speed
20MHz
Connectivity
I²C, SIO, SSU, 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 4x10b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 85°C
Package / Case
20-SSOP
For Use With
R0K5211B4S001BE - KIT STARTER FOR R8C/18191A1BR0K5211B4S000BE - KIT DEV EVALUATION R8C/1BR0E521174CPE10 - EMULATOR COMPACT R8C/18/19/1
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
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Manufacturer
Quantity
Price
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R8C/1A Group, R8C/1B Group
Rev.1.30
REJ09B0252-0130
10.4.2
10.4.1.1
10.4.1.2
10.4.1.3
10.4.2.1
10.4.2.2
10.4.2.3
The main clock divided by 1 (no division) provides the CPU clock. If the CM14 bit is set to 0 (low-speed on-
chip oscillator on) or the HRA00 bit in the HRA0 register is set to 1 (high-speed on-chip oscillator on), fRING
and fRING128 can be used as timers X and C. When the HRA00 bit is set to 1, fRING-fast can be used as timer
C. When the CM14 bit is set to 0 (low-speed on-chip oscillator on), fRING-S can be used for the watchdog
timer and voltage detection circuit.
The main clock divided by 2, 4, 8, or 16 provides the CPU clock. If the CM14 bit is set to 0 (low-speed on-chip
oscillator on) or the HRA00 bit in the HRA0 register is set to 1 (high-speed on-chip oscillator on), fRING and
fRING128 can be used as timers X and C. When the HRA00 bit is set to 1, fRING-fast can be used as timer C.
When the CM14 bit is set to 0 (low-speed on-chip oscillator on), fRING-S can be used for the watchdog timer
and voltage detection circuit.
The on-chip oscillator clock divided by 1 (no division), 2, 4, 8, or 16 provides the CPU clock. The on-chip
oscillator clock is also the clock source for the peripheral function clocks. When the HRA00 bit is set to 1,
fRING-fast can be used as timer C. When the CM14 bit is set to 0 (low-speed on-chip oscillator on), fRING-S
can be used for the watchdog timer and voltage detection circuit.
Since the CPU clock stops in wait mode, the CPU which operates using the CPU clock and the watchdog timer
when count source protection mode is disabled stop. The main clock and on-chip oscillator clock do not stop
and the peripheral functions using these clocks continue operating.
If the CM02 bit is set to 1 (peripheral function clock stops in wait mode), the f1, f2, f4, f8, and f32 clocks stop
in wait mode. This reduces power consumption.
The MCU enters wait mode when the WAIT instruction is executed.
The status before wait mode was entered is maintained.
Dec 08, 2006
Wait Mode
High-Speed Mode
Medium-Speed Mode
High-Speed and Low-Speed On-Chip Oscillator Modes
Peripheral Function Clock Stop Function
Entering Wait Mode
Pin Status in Wait Mode
Page 69 of 315
10. Clock Generation Circuit
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