Rev. 3.0, 03/01, page 235 of 390
Status Register [cont’d]
Bit
Description
Default
2
Receive error indication
1: indicates that a receive error has occurred.
0: indicates that a receive error does not occur.
This bit will be set when the next data receive is completed while both receive data buffers
are full.
This bit will be cleared when either one of the following conditions is met.
1.
At RESET
2.
When the RE bit in CTR is cleared to 0
3.
When STR is read and 0 is written to this bit, after the bit is set to 1
0
1
Indicates that no transmitted data are in either one of the two transmit data buffers
(TXDR).
1: indicates that at least either one of the two transmit data buffers (TXDR) does not have
the transmitted data.
0: indicates that both transmit data buffers contain the transmitted data.
This bit will be set when the following conditions are met.
1.
At RESET
2.
When the data in either one of the two transmit data buffers have been completely
transmitted.
3.
When the TE bit in CTR is cleared to 0.
This bit will be cleared when STR is read and 0 is written to this bit, after the bit is set to 1.
Note: When both of the transmit data buffers are empty (as in the cases when the TE bit
is cleared to 0), a clear operation must be performed twice since the empty status
of only one buffer has been canceled, as indicated by TAB bit.
0
0
Indicates that one or two receive data buffers (RXDR) are full of the received data.
1: indicates that at least one receive data buffer is full of the received data.
0: indicates that two receive data buffers are not completely full.
This bit will be set when data are stored in RXDR, or in all the words in RXDB0 or RXDB1.
This bit will be cleared when either one of the following conditions is met.
1) At RESET
2) When STR is READ and 0 is written to this bit, after the bit is set to 1.
Note: A clear operation must be performed twice when both of the receive data buffers
are full since the full status of only one receive data buffer has been canceled as
indicated by RAB.
0
Summary of Contents for HD64465
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