R5F21274SDFP#U0 Renesas Electronics America, R5F21274SDFP#U0 Datasheet - Page 394

IC R8C/27 MCU FLASH 32LQFP

R5F21274SDFP#U0

Manufacturer Part Number
R5F21274SDFP#U0
Description
IC R8C/27 MCU FLASH 32LQFP
Manufacturer
Renesas Electronics America
Series
R8C/2x/27r
Datasheet

Specifications of R5F21274SDFP#U0

Core Processor
R8C
Core Size
16/32-Bit
Speed
20MHz
Connectivity
I²C, LIN, SIO, SSU, UART/USART
Peripherals
LED, POR, Voltage Detect, WDT
Number Of I /o
25
Program Memory Size
16KB (16K x 8)
Program Memory Type
FLASH
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
2.2 V ~ 5.5 V
Data Converters
A/D 12x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
32-LQFP
For Use With
R0K521276S000BE - KIT DEV RSK-R8C/26-29R0E521000EPB00 - PROBE EMULATOR FOR PC7501
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-

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R8C/26 Group, R8C/27 Group
Rev.2.10
REJ09B0278-0210
19.5
19.5.1
Table 19.7
VCC,VSS
RESET
P4_6/XIN/XCIN
P4_7/XOUT/XCOUT P4_7 input/clock output I/O
P0_0 to P0_7
P1_0 to P1_7
P3_0, P3_1, P3_3 to
P3_6
P4_2/VREF
P5_3, P5_4
MODE
P3_7
P4_5
In standard serial I/O mode, the user ROM area can be rewritten while the MCU is mounted on-board by using a
serial programmer which is suitable for the MCU.
There are three types of Standard serial I/O modes:
This MCU uses Standard serial I/O mode 2 and Standard serial I/O mode 3.
Refer to Appendix 2. Connection Examples between Serial Writer and On-Chip Debugging Emulator.
Contact the manufacturer of your serial programmer for details. Refer to the user’s manual of your serial
programmer for instructions on how to use it.
Table 19.7 lists the Pin Functions (Flash Memory Standard Serial I/O Mode 2), Table 19.8 lists the Pin Functions
(Flash Memory Standard Serial I/O Mode 3), and Figure 19.17 shows the Pin Connections for Standard Serial I/O
Mode 3.
After processing the pins shown in Table 19.8 and rewriting the flash memory using the programmer, apply “H” to
the MODE pin and reset the hardware to run a program in the flash memory in single-chip mode.
• Standard serial I/O mode 1 ............Clock synchronous serial I/O used to connect with a serial programmer
• Standard serial I/O mode 2 ............Clock asynchronous serial I/O used to connect with a serial programmer
• Standard serial I/O mode 3 ............Special clock asynchronous serial I/O used to connect with a serial
The ID code check function determines whether the ID codes sent from the serial programmer and those written
in the flash memory match (refer to 19.3 Functions to Prevent Rewriting of Flash Memory).
Standard Serial I/O Mode
Sep 26, 2008
Pin
ID Code Check Function
Pin Functions (Flash Memory Standard Serial I/O Mode 2)
Power input
Reset input
P4_6 input/clock input
Input port P0
Input port P1
Input port P3
Input port P4
Input port P5
MODE
TXD output
RXD input
Page 375 of 453
Name
programmer
I
I
I
I
I/O Input “L”.
O
I
I
I
I
I/O
Apply the voltage guaranteed for programming and
erasure to the VCC pin and 0 V to the VSS pin.
Reset input pin.
Connect a ceramic resonator or crystal oscillator
between the XIN/XCIN and XOUT/XCOUT pins.
Input “H” or “L” level signal or leave the pin open.
Serial data output pin.
Serial data input pin.
Description
19. Flash Memory

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