R5F21257SNFP#U0 Renesas Electronics America, R5F21257SNFP#U0 Datasheet - Page 10

• Manufacturer Part Number: R5F21257SNFP#U0
• Description: IC R8C/25 MCU FLASH 52LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/2x/25r

Specifications of R5F21257SNFP#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: 48KB (48K x 8)
• Program Memory Type: FLASH
• Ram Size: 2.5K 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: -

SFR Page Reference ........................................................................................................................... B - 1
1.
2.
3.
4.
5.
6.
1.1
1.2
1.3
1.4
1.5
1.6
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
3.1
3.2
5.1
5.2
5.3
5.4
5.5
5.6
5.7
6.1
2.8.1
2.8.2
2.8.3
2.8.4
2.8.5
2.8.6
2.8.7
2.8.8
2.8.9
2.8.10
5.1.1
5.1.2
Overview ......................................................................................................................................... 1
Central Processing Unit (CPU) ..................................................................................................... 13
Memory ......................................................................................................................................... 16
Special Function Registers (SFRs) ............................................................................................... 18
Resets ........................................................................................................................................... 25
Voltage Detection Circuit .............................................................................................................. 33
Applications ............................................................................................................................................... 1
Performance Overview .............................................................................................................................. 2
Block Diagram .......................................................................................................................................... 4
Product Information .................................................................................................................................. 5
Pin Assignments ........................................................................................................................................ 9
Pin Functions ........................................................................................................................................... 11
Data Registers (R0, R1, R2, and R3) ...................................................................................................... 14
Address Registers (A0 and A1) ............................................................................................................... 14
Frame Base Register (FB) ....................................................................................................................... 14
Interrupt Table Register (INTB) .............................................................................................................. 14
Program Counter (PC) ............................................................................................................................. 14
User Stack Pointer (USP) and Interrupt Stack Pointer (ISP) .................................................................. 14
Static Base Register (SB) ........................................................................................................................ 14
Flag Register (FLG) ................................................................................................................................ 14
R8C/24 Group ......................................................................................................................................... 16
R8C/25 Group ......................................................................................................................................... 17
Hardware Reset ....................................................................................................................................... 28
Power-On Reset Function ....................................................................................................................... 30
Voltage Monitor 0 Reset ......................................................................................................................... 31
Voltage Monitor 1 Reset ......................................................................................................................... 31
Voltage Monitor 2 Reset ......................................................................................................................... 31
Watchdog Timer Reset ............................................................................................................................ 32
Software Reset ......................................................................................................................................... 32
VCC Input Voltage .................................................................................................................................. 40
Carry Flag (C) ..................................................................................................................................... 14
Debug Flag (D) ................................................................................................................................... 14
Zero Flag (Z) ....................................................................................................................................... 14
Sign Flag (S) ....................................................................................................................................... 14
Register Bank Select Flag (B) ............................................................................................................ 14
Overflow Flag (O) .............................................................................................................................. 14
Interrupt Enable Flag (I) ..................................................................................................................... 15
Stack Pointer Select Flag (U) .............................................................................................................. 15
Processor Interrupt Priority Level (IPL) ............................................................................................. 15
Reserved Bit ........................................................................................................................................ 15
When Power Supply is Stable ............................................................................................................. 28
Power On ............................................................................................................................................ 28
Table of Contents
A - 1