D12312SVF20V Renesas Electronics America, D12312SVF20V Datasheet - Page 525

• Manufacturer Part Number: D12312SVF20V
• Description: IC H8S/2312S MCU ROMLESS 100QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of D12312SVF20V

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SCI, SmartCard
• Peripherals: POR, PWM, WDT
• Number Of I /o: 70
• Program Memory Type: ROMless
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-QFP
• For Use With: EDK2329 - DEV EVALUATION KIT H8S/2329
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

A TEI interrupt is requested when the TEND flag is set to 1 while the TEIE bit is set to 1. The
TEND flag is cleared at the same time as the TDRE flag. Consequently, if a TEI interrupt and a
TXI interrupt are requested simultaneously, the TXI interrupt may be accepted first, with the result
that the TDRE and TEND flags are cleared. Note that the TEI interrupt will not be accepted in
this case.
12.5
The following points should be noted when using the SCI.
Relation between Writes to TDR and the TDRE Flag: The TDRE flag in SSR is a status flag
that indicates that transmit data has been transferred from TDR to TSR. When the SCI transfers
data from TDR to TSR, the TDRE flag is set to 1.
Data can be written to TDR regardless of the state of the TDRE flag. However, if new data is
written to TDR when the TDRE flag is cleared to 0, the data stored in TDR will be lost since it has
not yet been transferred to TSR. It is therefore essential to check that the TDRE flag is set to 1
before writing transmit data to TDR.
Operation when Multiple Receive Errors Occur Simultaneously: If a number of receive errors
occur at the same time, the state of the status flags in SSR is as shown in table 12.13. If there is an
overrun error, data is not transferred from RSR to RDR, and the receive data is lost.
Table 12.13 State of SSR Status Flags and Transfer of Receive Data
1
0
0
1
1
0
1
Notes:
RDRF
X: Receive data is not transferred from RSR to RDR.
ORER
1
0
0
1
1
0
1
SSR Status Flags
Usage Notes
: Receive data is transferred from RSR to RDR.
0
1
0
1
0
1
1
FER
0
0
1
0
1
1
1
PER
X
X
X
X
Receive Data Transfer
from RSR to RDR
Section 12 Serial Communication Interface (SCI)
Rev.7.00 Feb. 14, 2007 page 491 of 1108
Overrun error
Framing error
Parity error
Overrun error + framing error
Overrun error + parity error
Framing error + parity error
Overrun error + framing error +
parity error
Receive Error Status
REJ09B0089-0700