HD6473937W Renesas Electronics America, HD6473937W Datasheet - Page 323
HD6473937W
Manufacturer Part Number
HD6473937W
Description
MCU FLASH OTP 60K 100-TQFP
Manufacturer
Renesas Electronics America
Series
H8® H8/300L SLPr
Datasheet
1.HD6473937RXV.pdf
(523 pages)
Specifications of HD6473937W
Core Processor
H8/300L
Core Size
8-Bit
Speed
10MHz
Connectivity
SCI
Peripherals
POR, WDT
Number Of I /o
59
Program Memory Size
60KB (60K x 8)
Program Memory Type
OTP
Ram Size
2K x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 3.6 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
100-TQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
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Part Number:
HD6473937W
Manufacturer:
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10.3.5
The following points should be noted when using SCI3.
1. Relation between writes to TDR and bit TDRE
Bit TDRE in the serial status register (SSR) is a status flag that indicates that data for serial
transmission has not been prepared in TDR. When data is written to TDR, bit TDRE is cleared to
0 automatically. When SCI3 transfers data from TDR to TSR, bit TDRE is set to 1.
Data can be written to TDR irrespective of the state of bit TDRE, but if new data is written to
TDR while bit TDRE is cleared to 0, the data previously stored in TDR will be lost of it has not
yet been transferred to TSR. Accordingly, to ensure that serial transmission is performed
dependably, you should first check that bit TDRE is set to 1, then write the transmit data to TDR
once only (not two or more times).
2. Operation when a number of receive errors occur simultaneously
If a number of receive errors are detected simultaneously, the status flags in SSR will be set to the
states shown in table 10-17. If an overrun error is detected, data transfer from RSR to RDR will
not be performed, and the receive data will be lost.
Table 10-17 SSR Status Flag States and Receive Data Transfer
SSR Status Flags
RDRF* OER
1
0
0
1
1
0
1
Note:
:
:
Receive data is transferred from RSR to RDR.
Receive data is not transferred from RSR to RDR.
*
1
0
0
1
1
0
1
Application Notes
Bit RDRF retains its state prior to data reception. However, note that if RDR is read
after an overrun error has occurred in a frame because reading of the receive data in
the previous frame was delayed, RDRF will be cleared to 0.
FER
0
1
0
1
0
1
1
PER
0
0
1
0
1
1
1
Receive Data Transfer
RSR
RDR
Receive Error Status
Overrun error
Framing error
Parity error
Overrun error + framing error
Overrun error + parity error
Framing error + parity error
Overrun error + framing error + parity error
309
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