mc68hc908bd48 Freescale Semiconductor, Inc, mc68hc908bd48 Datasheet - Page 202
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mc68hc908bd48
Manufacturer Part Number
mc68hc908bd48
Description
M68hc08 Microcontrollers Microcontroller
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC68HC908BD48.pdf
(288 pages)
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DDC12AB Interface
15.6.5 DDC Status Register (DSR)
Data Sheet
202
Address:
RXIF — DDC Receive Interrupt Flag
TXIF — DDC Transmit Interrupt Flag
MATCH — DDC Address Match
Reset:
Read:
Write:
This flag is set after the data receive register (DDRR) is loaded with a
new received data. Once the DDRR is loaded with received data, no
more received data can be loaded to the DDRR register until the CPU
reads the data from the DDRR to clear RXBF flag. RXIF generates an
interrupt request to CPU if the DIEN bit in DCR is also set. This bit is
cleared by writing "0" to it or by reset; or when the DEN = 0.
This flag is set when data in the data transmit register (DDTR) is
downloaded to the output circuit, and that new data can be written to
the DDTR. TXIF generates an interrupt request to CPU if the DIEN bit
in DCR is also set. This bit is cleared by writing "0" to it or when the
DEN = 0.
This flag is set when the received data in the data receive register
(DDRR) is an calling address which matches with the address or its
extended addresses (EXTAD=1) specified in the DADR register.
1 = New data in data receive register (DDRR)
0 = No data received
1 = Data transfer completed
0 = Data transfer in progress
1 = Received address matches DADR
0 = Received address does not match
$0019
RXIF
Bit 7
0
0
Figure 15-5. DDC Status Register (DSR)
= Unimplemented
DDC12AB Interface
TXIF
6
0
0
MATCH
5
0
SRW
4
0
RXAK
3
1
MC68HC908BD48
SCLIF
Freescale Semiconductor
2
0
0
TXBE
1
1
—
Rev. 2.1
RXBF
Bit 0
0
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