R5F21162SP#U0 Renesas Electronics America, R5F21162SP#U0 Datasheet - Page 252

• Manufacturer Part Number: R5F21162SP#U0
• Description: IC R8C MCU FLASH 8K 20SSOP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/R8C/Tiny/16r

Specifications of R5F21162SP#U0

• Core Processor: R8C
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, SIO, UART/USART
• Peripherals: LED, POR, Voltage Detect, WDT
• Number Of I /o: 13
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 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: R0K521134S000BE - KIT EVAL STARTER FOR R8C/13
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/16 Group, R8C/17 Group
Rev.2.10
REJ09B0169-0210
20.2
20.2.1
20.2.2
20.2.3
20.2.4
Do not read the address 00000h by a program. When a maskable interrupt request is acknowledged,
the CPU reads interrupt information (interrupt number and interrupt request level) from 00000h in the
interrupt sequence. At this time, the acknowledged interrupt IR bit is set to “0”.
If the address 00000h is read in a program, the IR bit for the interrupt which has the highest priority
among the enabled interrupts is set to “0”. This may cause a problem that the interrupt is canceled, or
an unexpected interrupt is generated.
Set any value in the SP before an interrupt is acknowledged. The SP is set to “0000h” after reset.
Therefore, if an interrupt is acknowledged before setting any value in the SP, the program may run
out of control.
Either an “L” level or an “H” level of at least 250ns width is necessary for the signal input to the INT0
to INT3 pins and KI0 to KI3 pins regardless of the CPU clock.
Reset the watchdog timer after a watchdog timer interrupt is generated.
Interrupts
Jan 19, 2006
Reading Address 00000h
SP Setting
External Interrupt and Key Input Interrupt
Watchdog Timer Interrupt
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20. Precautions