R5F21257SNFP#U0 Renesas Electronics America, R5F21257SNFP#U0 Datasheet - Page 347
![IC R8C/25 MCU FLASH 52LQFP](/photos/12/37/123739/r5f21257snfp_u0_sml.jpg)
R5F21257SNFP#U0
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
-
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R8C/24 Group, R8C/25 Group
Rev.3.00
REJ09B0244-0300
Figure 16.18
(1)
(2)
NOTE:
Feb 29, 2008
1. Write 0 after reading 1 to set the ORER bit to 0.
Initialization in 4-Wire Bus Communication Mode
SSER register
SSMR register
SSCRH register
SSMR2 register
SSMR2 register
SSSR register
SSER register
SSCRH register
Page 328 of 485
Set bits CPHS and CPOS
MLS bits ← 0
RE bit ← 1 (receive)
TE bit ← 1 (transmit)
Set bits RIE, TEIE, and TIE
Start
Set bits CKS0 to CKS2
Set RSSTP bit
End
Set bits SOOS, CSS0 to
CSS1, and BIDE
SCKS bit ← 1
ORER bit ← 0
SSUMS bit ← 1
RE bit ← 0
TE bit ← 0
Set MSS bit
(1)
(2) Set the BIDE bit to 1 in bidirectional mode and
(1) The MLS bit is set to 0 for MSB-first transfer.
set the I/O of the SCS pin by bits CSS0 and
CSS1.
The clock polarity and phase are set by bits
CPHS and CPOS.
16. Clock Synchronous Serial Interface
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