R5F21257SYFP#U0 Renesas Electronics America, R5F21257SYFP#U0 Datasheet - Page 347

• Manufacturer Part Number: R5F21257SYFP#U0
• Description: MCU 2KB FLASH 48K 52-LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/2x/25r

Specifications of R5F21257SYFP#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 ~ 105°C
• Package / Case: 52-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

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