R5F21324CNSP#U0 Renesas Electronics America, R5F21324CNSP#U0 Datasheet - Page 403

• Manufacturer Part Number: R5F21324CNSP#U0
• Description: MCU 1KB FLASH 16K ROM 20-LSSOP
• Manufacturer: Renesas Electronics America
• Series: R8C/3x/32Cr

Specifications of R5F21324CNSP#U0

• Core Processor: R8C
• Core Size: 16/32-Bit
• Speed: 20MHz
• Connectivity: I²C, LIN, SIO, SSU, UART/USART
• Peripherals: POR, PWM, Voltage Detect, WDT
• Number Of I /o: 15
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 1.5K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 20-LSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/32C Group
REJ09B0573-0100 Rev.1.00 Dec. 18, 2009
Page 374 of 573
24.3.3
Table 24.3
CEIE, RIE, TEIE and TIE: Bits in SSER register
ORER, RDRF, TEND and TDRE: Bits in SSSR register
Transmit data empty
Transmit end
Receive data full
Overrun error
Conflict error
If the generation conditions in Table 24.3 are met, a synchronous serial communication unit interrupt request is
generated. Set each interrupt source to 0 by a synchronous serial communication unit interrupt routine.
However, the TDRE and TEND bits are automatically set to 0 by writing transmit data to the SSTDR register and
the RDRF bit is automatically set to 0 by reading the SSRDR register. In particular, the TDRE bit is set to 1 (data
transmitted from registers SSTDR to SSTRSR) at the same time transmit data is written to the SSTDR register.
Setting the TDRE bit to 0 (data not transmitted from registers SSTDR to SSTRSR) can cause an additional byte of
data to be transmitted.
Synchronous serial communication unit has five interrupt requests: transmit data empty, transmit end, receive
data full, overrun error, and conflict error. Since these interrupt requests are assigned to the synchronous serial
communication unit interrupt vector table, determining interrupt sources by flags is required.
Table 24.3 lists the Synchronous Serial Communication Unit Interrupt Requests.
Interrupt Request
Interrupt Requests
Synchronous Serial Communication Unit Interrupt Requests
TXI
TEI
RXI
OEI
CEI
Abbreviation
24. Synchronous Serial Communication Unit (SSU)
TIE = 1, TDRE = 1
TEIE = 1, TEND = 1
RIE = 1, RDRF = 1
RIE = 1, ORER = 1
CEIE = 1, CE = 1
Generation Condition