DF3048BVX25V Renesas Electronics America, DF3048BVX25V Datasheet - Page 537

• Manufacturer Part Number: DF3048BVX25V
• Description: MCU 3/5V 128K PB-FREE 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of DF3048BVX25V

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 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: -

13.5
Note the following points when using the SCI.
TDR Write and TDRE Flag
The TDRE flag in SSR is a status flag indicating the loading of transmit data from TDR into TSR.
The SCI sets the TDRE flag to 1 when it transfers data from TDR to TSR.
Data can be written into TDR regardless of the state of the TDRE flag. If new data is written in
TDR when the TDRE flag is 0, the old data stored in TDR will be lost because this data has not
yet been transferred to TSR. Before writing transmit data in TDR, be sure to check that the TDRE
flag is set to 1.
Simultaneous Multiple Receive Errors
Table 13.13 indicates the state of SSR status flags when multiple receive errors occur
simultaneously. When an overrun error occurs the RSR contents are not transferred to RDR, so
receive data is lost.
Table 13.13 SSR Status Flags and Transfer of Receive Data
RDRF
1
0
0
1
1
0
1
Legend:
O: Receive data is transferred from RSR to RDR.
: Receive data is not transferred from RSR to RDR.
SSR Status Flags
ORER
1
0
0
1
1
0
1
Usage Notes
FER
0
1
0
1
0
1
1
PER
0
0
1
0
1
1
1
Receive Data
Transfer
RSR
O
O
O
RDR
Section 13 Serial Communication Interface
Receive Errors
Overrun error
Framing error
Parity error
Overrun error + framing error
Overrun error + parity error
Framing error + parity error
Overrun error + framing error + parity error
Rev. 3.00 Sep 27, 2006 page 509 of 872
REJ09B0325-0300