HD6473837HV Renesas Electronics America, HD6473837HV Datasheet - Page 309
HD6473837HV
Manufacturer Part Number
HD6473837HV
Description
MCU 3/5V 60K PB-FREE 100-QFP
Manufacturer
Renesas Electronics America
Series
H8® H8/300Lr
Datasheet
1.HD6473837HV.pdf
(562 pages)
Specifications of HD6473837HV
Core Processor
H8/300L
Core Size
8-Bit
Speed
5MHz
Connectivity
SCI
Peripherals
LCD, PWM
Number Of I /o
84
Program Memory Size
60KB (60K x 8)
Program Memory Type
OTP
Ram Size
2K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 12x8b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
100-QFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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10.4.8
When using SCI3, attention should be paid to the following matters.
Relation between Bit TDRE and Writing Data to TDR: Bit TDRE in the serial status register
(SSR) is a status flag indicating that TDR does not contain new transmit data. TDRE is
automatically cleared to 0 when data is written to TDR. When SCI3 transfers data from TDR to
TSR, bit TDRE is set to 1.
Data can be written to TDR regardless of the status of bit TDRE. However, if new data is written
to TDR while TDRE is cleared to 0, assuming the data held in TDR has not yet been shifted to
TSR, it will be lost. For this reason it is advisable to confirm that bit TDRE is set to 1 before each
write to TDR and not write to TDR more than once without checking TDRE in between.
Operation when Multiple Receive Errors Occur at the Same Time: When two or more receive
errors occur at the same time, the status flags in SSR are set as shown in table 10.19. If an overrun
error occurs, data is not transferred from RSR to RDR, and receive data is lost.
Table 10.19 SSR Status Flag States and Transfer of Receive Data
RDRF
*
1
0
0
1
1
0
1
Notation:
O: Receive data transferred from RSR to RDR
Note: * RDRF keeps the same state as before the data was received. However, if due to a late read
Break Detection and Processing: Break signals can be detected by reading the RXD pin directly
when a framing error (FER) is detected. In the break state the input from the RXD pin consists of
all 0s, so FER is set and the parity error flag (PER) may also be set. In the break state SCI3
continues to receive, so if the FER bit is cleared to 0 it will be set to 1 again.
292
: Receive data not transferred from RSR to RDR
SSR Status Flags
of received data in one frame an overrun error occurs in the next frame, RDRF is cleared to
0 when RDR is read.
OER
1
0
0
1
1
0
1
Application Notes
FER
0
1
0
1
0
1
1
PER
0
0
1
0
1
1
1
Receive Error Status
(RSR
O
O
O
RDR)
Receive Data Transfer
Overrun error
Framing error
Parity error
Overrun error + framing error
Overrun error + parity error
Framing error + parity error
Overrun error + framing error + parity error
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