R5F21324CNSP#U0 Renesas Electronics America, R5F21324CNSP#U0 Datasheet - Page 417

• 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 388 of 573
Figure 24.12
RDRF bit in
SSSR register
RSSTP bit in
SSCRH register
Processing
by program
RDRF bit in
SSSR register
RSSTP bit in
SSCRH register
Processing
by program
• CPHS bit = 0 (data download at even edges), CPOS bit = 0 (“H” when clock stops), and BS3
• CPHS bit = 1 (data download at odd edges), CPOS bit = 0 (“H” when clock stops), and BS3 to
to BS0 = 1000b (8 bits)
BS0 = 1000b (8 bits)
(output)
(output)
SSCK
SSCK
SCS
SCS
SSI
SSI
Example of Synchronous Serial Communication Unit Operation during Data
Reception (4-Wire Bus Communication Mode, 8-Bit SSU Data Transfer Length)
BS0 to BS3: Bits in SSBR register
CPHS and CPOS: Bits in SSMR register
Dummy read in
SSRDR register
Dummy read in
SSRDR register
b7
b7
1 frame
RXI interrupt request
is generated
RXI interrupt request
is generated
1 frame
b0
Data read in SSRDR
register
Data read in SSRDR
register
b0
b7
b7
1 frame
24. Synchronous Serial Communication Unit (SSU)
RXI interrupt request
is generated
RXI interrupt request
is generated
1 frame
b0
b0
Set RSSTP
bit to 1
Set RSSTP
bit to 1
b7
b7
Data read in SSRDR
register
Data read in SSRDR
register
RXI interrupt request
is generated
RXI interrupt request
is generated
High-impedance
b0
High-impedance
b0