R5F2121AJFP#U0 Renesas Electronics America, R5F2121AJFP#U0 Datasheet - Page 300

• 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
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 of addresses 00B8h to 00BFh. Registers, bits, symbols and
functions vary even in the same addresses depending on the modes. Refer to registers 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
IICSEL Bit
Clock synchronous serial I/O with chip select (SSU)
I
The clock synchronous serial interface contains 4 modes.
Table 16.1 lists the Mode Selections. Refer to 16.2 Clock Synchronous Serial I/O with Chip Select (SSU) or after
for details of each mode.
2
Register
in PMR
C bus interface
0
0
1
1
Mode Selection
(ICE Bit in ICCR1
Mode Selections
Bit 7 in 00B8h
Register)
0
0
1
1
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Register, FS Bit in SAR
(SSUMS Bit in SSMR2
Bit 0 in 00BDh
Register)
0
1
0
1
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