R5F21256SNFP#U0 Renesas Electronics America, R5F21256SNFP#U0 Datasheet - Page 40

• Manufacturer Part Number: R5F21256SNFP#U0
• Description: IC R8C MCU FLASH 32K 52LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/2x/25r

Specifications of R5F21256SNFP#U0

• Core Processor: R8C
• Core Size: 16/32-Bit
• Speed: 20MHz
• Connectivity: I²C, LIN, SIO, SSU, UART/USART
• Peripherals: POR, Voltage Detect, WDT
• Number Of I /o: 41
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 2.2 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 52-LQFP
• For Use With: R0K521256S000BE - KIT EVAL STARTER FOR R8C/25
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Rev.2.00 Oct 17, 2005
REJ09B0001-0200
Chapter 1 Overview
Figure 1.10.2 Variable Vector Table
1.10.2 Variable Vector Tables
A variable vector table is an address-variable vector table. Specifically, this type of vector table is a 256-
byte interrupt vector table that uses the value indicated by the interrupt table register (INTB) as the entry
address (IntBase). Figure 1.10.2 shows a variable vector table.
Variable vector tables are composed of four bytes per table. Each vector table must contain the inter-
rupt handler routine’s entry address.
Each vector table has software interrupt numbers (0 to 63), which are used by the INT instruction.
Interrupts for the on-chip peripheral functions of each M16C model are allocated to software interrupt
numbers 0 through 31.
INTB
b19
IntBase
page 20 of 263
IntBase+4
IntBase+8
IntBase+252
b0
0
1
31
32
33
63
Software interrupt
numbers
Vectors accommodat-
ing peripheral I/O
interrupts
1.10 Vector Tables