R5F21257SNFP#U0 Renesas Electronics America, R5F21257SNFP#U0 Datasheet - Page 324

• Manufacturer Part Number: R5F21257SNFP#U0
• Description: IC R8C/25 MCU FLASH 52LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/2x/25r

Specifications of R5F21257SNFP#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 ~ 85°C
• Package / Case: 52-LQFP
• For Use With: R0K521256S000BE - KIT EVAL STARTER FOR R8C/25
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/24 Group, R8C/25 Group
Rev.3.00
REJ09B0244-0300
16. Clock Synchronous Serial Interface
The clock synchronous serial interface is configured as follows.
Clock synchronous serial interface
The clock synchronous serial interface uses the registers at addresses 00B8h to 00BFh. Registers, bits, symbols, and
functions vary even for the same addresses depending on the mode. Refer to the register diagrams of each function for
details.
Also, the differences between clock synchronous communication mode and clock synchronous serial mode are the
options of the transfer clock, clock output format, and data output format.
16.1
Table 16.1
0
0
1
1
IICSEL Bit
Clock synchronous serial I/O with chip select (SSU)
I
The clock synchronous serial interface has four modes.
Table 16.1lists the Mode Selections. Refer to 16.2 Clock Synchronous Serial I/O with Chip Select (SSU) and the
sections that follow for details of each mode.
Register
2
in PMR
C bus Interface
Mode Selection
Feb 29, 2008
(ICE Bit in ICCR1
0
0
1
1
Bit 7 in 00B8h
Mode Selections
Register)
Page 305 of 485
(SSUMS Bit in SSMR2
0
1
0
1
Register, FS Bit in
Bit 0 in 00BDh
SAR Register)
Clock synchronous
serial I/O with chip
select
I
2
C bus interface
Function
Clock synchronous communication mode
4-wire bus communication mode
I
Clock synchronous serial mode
2
C bus interface mode
16. Clock Synchronous Serial Interface
Clock synchronous
communication mode
4-wire bus communication mode
I
Clock synchronous serial mode
2
C bus interface mode
Mode