Datasheet

V850ES/JG3 CHAPTER 15 ASYNCHRONOUS SERIAL INTERFACE A (UARTA)
R01UH0015EJ0300 Rev.3.00 Page 457 of 870
Sep 30, 2010
UAnTSF
• When the UAnPWR bit = 0 or the UAnTXE bit = 0 has been set.
• When, following transfer completion, there was no next data transfer
from UAnTX register
Write to UAnTX register
UAnTSF
0
1
Transfer status flag
UAnSTR
(n = 0 to 2)
0 0 0 0 UAnPE UAnFE UAnOVE
6 5 4 3 <2> <1>
After reset: 00H R/W Address: UA0STR FFFFFA04H, UA1STR FFFFFA14H,
UA2STR FFFFFA24H
The UAnTSF bit is always 1 when performing continuous transmission. When
initializing the transmission unit, check that the UAnTSF bit = 0 before performing
initialization. The transmit data is not guaranteed when initialization is performed
while the UAnTSF bit = 1.
• When the UAnPWR bit = 0 or the UAnRXE bit = 0 has been set.
• When 0 has been written
When parity of data and parity bit do not match during reception.
UAnPE
0
1
Parity error flag
• The operation of the UAnPE bit is controlled by the settings of the
UAnCTL0.UAnPS1 and UAnCTL0.UAnPS0 bits.
•
The UAnPE bit can be read and written, but it can only be cleared by writing 0 to it, and
it cannot be set by writing 1 to it. When 1 is written to this bit, the value is retained.
• When the UAnPWR bit = 0 or the UAnRXE bit = 0 has been set
• When 0 has been written
When no stop bit is detected during reception
UAnFE
0
1
Framing error flag
• Only the first bit of the receive data stop bits is checked, regardless of the value
of the UAnCTL0.UAnSL bit.
• The UAnFE bit can be both read and written, but it can only be cleared by
writing 0 to it, and it cannot be set by writing 1 to it. When 1 is written to this bit,
the value is retained .
• When the UAnPWR bit = 0 or the UAnRXE bit = 0 has been set.
• When 0 has been written
When receive data has been set to the UAnRX register and the next
receive operation is completed before that receive data has been read
UAnOVE
0
1
Overrun error flag
• When an overrun error occurs, the data is discarded without the next receive data
being written to the receive buffer.
• The UAnOVE bit can be both read and written, but it can only be cleared by writing
0 to it. When 1 is written to this bit,
the value is retained .
<7> <0>