R5F21191SP#U0 Renesas Electronics America, R5F21191SP#U0 Datasheet - Page 5

• 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: -

General Precautions in the Handling of MPU/MCU Products
The following usage notes are applicable to all MPU/MCU products from Renesas. For detailed usage notes on the
products covered by this manual, refer to the relevant sections of the manual. If the descriptions under General
Precautions in the Handling of MPU/MCU Products and in the body of the manual differ from each other, the description
in the body of the manual takes precedence.
1. Handling of Unused Pins
2. Processing at Power-on
3. Prohibition of Access to Reserved Addresses
4. Clock Signals
5. Differences between Products
Handle unused pins in accord with the directions given under Handling of Unused Pins in the manual.
 The input pins of CMOS products are generally in the high-impedance state. In operation with an
The state of the product is undefined at the moment when power is supplied.
 The states of internal circuits in the LSI are indeterminate and the states of register settings and pins
Access to reserved addresses is prohibited.
 The reserved addresses are provided for the possible future expansion of functions. Do not access
After applying a reset, only release the reset line after the operating clock signal has become stable.
When switching the clock signal during program execution, wait until the target clock signal has
stabilized.
 When the clock signal is generated with an external resonator (or from an external oscillator) during
Before changing from one product to another, i.e. to one with a different type number, confirm that the
change will not lead to problems.
 The characteristics of MPU/MCU in the same group but having different type numbers may differ
are undefined at the moment when power is supplied.
these addresses; the correct operation of LSI is not guaranteed if they are accessed.
a reset, ensure that the reset line is only released after full stabilization of the clock signal. Moreover,
when switching to a clock signal produced with an external resonator (or by an external oscillator)
while program execution is in progress, wait until the target clock signal is stable.
because of the differences in internal memory capacity and layout pattern. When changing to
products of different type numbers, implement a system-evaluation test for each of the products.
unused pin in the open-circuit state, extra electromagnetic noise is induced in the vicinity of LSI, an
associated shoot-through current flows internally, and malfunctions occur due to the false
recognition of the pin state as an input signal become possible. Unused pins should be handled as
described under Handling of Unused Pins in the manual.
In a finished product where the reset signal is applied to the external reset pin, the states of pins are
not guaranteed from the moment when power is supplied until the reset process is completed.
In a similar way, the states of pins in a product that is reset by an on-chip power-on reset function
are not guaranteed from the moment when power is supplied until the power reaches the level at
which resetting has been specified.