DF3052BX25V Renesas Electronics America, DF3052BX25V Datasheet - Page 469

• Manufacturer Part Number: DF3052BX25V
• Description: MCU 5V 512K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of DF3052BX25V

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

13.2
13.2.1
RSR is the register that receives serial data.
Bit
Read/Write
The SCI loads serial data input at the RxD pin into RSR in the order received, LSB (bit 0) first,
thereby converting the data to parallel data. When 1 byte has been received, it is automatically
transferred to RDR. The CPU cannot read or write RSR directly.
13.2.2
RDR is the register that stores received serial data.
Bit
Initial value
Read/Write
When the SCI finishes receiving 1 byte of serial data, it transfers the received data from RSR into
RDR for storage. RSR is then ready to receive the next data. This double buffering allows data to
be received continuously.
RDR is a read-only register. Its contents cannot be modified by the CPU. RDR is initialized to
H'00 by a reset and in standby mode.
Register Descriptions
Receive Shift Register (RSR)
Receive Data Register (RDR)
—
R
7
7
0
—
R
6
6
0
—
R
5
5
0
—
R
4
4
0
Section 13 Serial Communication Interface
Rev. 3.00 Mar 21, 2006 page 439 of 814
—
R
3
3
0
—
R
2
2
0
—
R
1
1
0
REJ09B0302-0300
—
R
0
0
0