HD64F3026X25 Renesas Electronics America, HD64F3026X25 Datasheet - Page 449

• Manufacturer Part Number: HD64F3026X25
• Description: MCU 3V 256K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of HD64F3026X25

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K 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: Contains lead / RoHS non-compliant
• Eeprom Size: -

12.5
12.5.1
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 to 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 12.13 shows the state of the 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 12.13 SSR Status Flags and Transfer of Receive Data
RDRF
1
0
0
1
1
0
1
Notes:
: Receive data is not transferred from RSR to RDR.
: Receive data is transferred from RSR to RDR.
Usage Notes
Notes on Use of SCI
ORER
1
0
0
1
1
0
1
SSR Status Flags
FER
0
1
0
1
0
1
1
PER
0
0
1
0
1
1
1
Receive Data Transfer
RSR
Section 12 Serial Communication Interface
Rev. 2.00 Sep 20, 2005 page 409 of 800
RDR
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
REJ09B0260-0200