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5-4
associated 8067 port using the MDATA
(0xFC25/0xFC2D) register, which contains output data,
and the LESI (0xFC24/0xFC2C) register, which is used to
read the port pins. Setting this bit disables automatic
receive or transmit over the 8067 interface.
R
Reserved (read only)
BSY
Port Busy Flag
This bit is set to a 1 when the associated 8067 port is in
any state other than idle. Writing a 0 to this bit will remove
the lockout to the other 8067 port. This bit should only be
cleared when the device connected to this port is not
responding. Therefore, a 0x10 should be written to this
register when clearing interrupts.
RRF
Read Register Full (read only)
This read only bit is written to a 1 when a read request
has been made from the associated 8067 port and the
microcontroller loads the RDATAx (0xFC20/0xFC28)
register. This bit is cleared by the associated 8067 port
when the register data has been transferred onto the
associated 8067 port and acknowledged.
WRF
Write Register Full (read only)
This bit is written to a 1 by the associated 8067 port when
a byte of data has been loaded into the WDATAx
(0xFC21/0xFC29) register from the associated 8067 port.
When the microcontroller reads the WDATAx
(0xFC21/0xFC29) register this bit will be automatically
cleared. This bit is read only.
RINT
Read Interrupt
This bit is written to a 1 by the associated 8067 port when
a read request has been made from the associated 8067
port. This notifies the microcontroller to load the RDATAx
(0xFC20/0xFC28) register. The WINT and the RINT bits
are ORed together to generate the port interrupt, which
goes to the microcontroller using the
(ISR)
WINT
Write Interrupt
This bit is written to a 1 by the associated 8067 port when
a byte of data has been loaded into the WDATAx
(0xFC21/0xFC29) register from the associated 8067 port.
SFF-8067 Registers
register (0xFE04).
[6:5]
4
3
2
1
Interrupt Status
0
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