R4F24278NVFQU Renesas Electronics America, R4F24278NVFQU Datasheet - Page 1130

• Manufacturer Part Number: R4F24278NVFQU
• Description: MCU 512K/48K 2.7-5.5V 144-LQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2400r

Specifications of R4F24278NVFQU

• Core Processor: H8S/2600
• Core Size: 16/32-Bit
• Speed: 33MHz
• Connectivity: EBI/EMI, I²C, IrDA, SCI, Smart Card, SPI, SSU, UART/USART
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 98
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• Eeprom Size: -
• Ram Size: 64K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 16x10b; D/A 2x8b
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 144-LQFP
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Section 20 Synchronous Serial Communication Unit (SSU)
(3)
Figure 20.7 shows an example of reception operation, and figure 20.8 shows a flowchart example
of data reception. When receiving data, the SSU operates as shown below.
After setting the RE bit to 1 and dummy-reading SSRDR, the SSU starts data reception.
In master mode, the SSU outputs a transfer clock and receives data. In slave mode, when a low
level signal is input to the SCS pin and a transfer clock is input to the SSCK pin, the SSU receives
data in synchronization with the transfer clock.
When 1-frame data has been received, the RDRF bit in SSSR is set to 1 and the receive data is
stored in SSRDR. At this time, if the RIE bit in SSER is set to 1, an RXI interrupt is generated.
The RDRF bit is automatically cleared to 0 by reading SSRDR.
When the RDRF bit has been set to 1 at the 8th rising edge of the transfer clock, the ORER bit in
SSSR is set to 1. This indicates that an overrun error (OEI) has occurred. At this time, data
reception is stopped. While the ORER bit in SSSR is set to 1, reception is not performed. To
resume the reception, clear the ORER bit to 0.
Page 1100 of 1448
When 8-Bit Data Length is Selected (SSRDR0 is Valid) with CPOS = 0 and CPHS = 0
Data Reception
User operation
LSI operation
SSCK
RDRF
Figure 20.7 (1) Example of Reception Operation (SSU Mode)
SCS
SSI
Dummy-read SSRDR0
Bit
0
Bit
(LSB first transmission)
1
Bit
2
1 frame
SSRDR0
Bit
3
Bit
4
Bit
5
Bit
6
REI interrupt
generated
Bit
7
Read SSRDR0
Bit
7
(MSB first transmission)
Bit
6
Bit
H8S/2427, H8S/2427R, H8S/2425 Group
5
SSRDR0
1 frame
Bit
4
Bit
3
Bit
2
REJ09B0565-0100 Rev. 1.00
REI interrupt
Bit
generated
1
Bit
0
Jul 22, 2010