R5F2121AJFP#U0 Renesas Electronics America, R5F2121AJFP#U0 Datasheet - Page 317

• Manufacturer Part Number: R5F2121AJFP#U0
• Description: MCU FLASH 96K 5K CMOS 48-LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/2x/21r

Specifications of R5F2121AJFP#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: 96KB (96K x 8)
• Program Memory Type: FLASH
• Ram Size: 5K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/20 Group, R8C/21 Group
Rev.2.00 Aug 27, 2008
REJ09B0250-0200
Figure 16.14
NOTE:
(1)
(2)
(3)
1. Write 0 after reading 1 to set the TEND bit to 0.
SSSR register
SSER register
Write transmit data to SSTDR register
Sample Flowchart of Data Transmission (Clock Synchronous Communication Mode)
Read TDRE bit in SSSR register
Read TEND bit in SSSR register
Page 299 of 458
Data transmit
Initialization
TDRE = 1 ?
TEND = 1 ?
continued?
Start
End
TEND bit ← 0
TE bit ← 0
Yes
No
Yes
No
(1)
Yes
No
(2) Determine whether data transmit is continued
(3) When the data transmit is completed, the TEND
(1) After reading the SSSR register and confirming
that the TDRE bit is set to 1, write the transmit
data to the SSTDR register. When write the
transmit data to the SSTDR register, the TDRE bit
is automatically set to 0.
bit is set to 1. Set the TEND bit to 0 and the TE bit
to 0 and complete transmit mode.
16. Clock Synchronous Serial Interface