Transmitter Ready
(TXR)
Enable Transmitter
(ENTX)
Load Word 1
(/LD1)
Load Word 2
(/LD2)
Data Bus
(D0 - D15)
(W1) (W2) (W1) (W2) (W1) (W2) (W1) (W2) (W1) (W2) (W1) (W2)
Transmitter Data
(DO(A)/DO(B))
Word 8
Word 1
TX Starts First Word
User Enables TX
User Loads 6th Word
User Loads 5th Word
User Loads 4th Word
User Loads 3rd Word
User Loads 2nd Word
TXR low indicates TX not Empty
User Loads 1st Word
User Disables TX
TXR HIGH indicates TX is empty and
user may load data
TXR transmitts last word from buffer
Figure 5: Typical Transmitter Load Sequence
Data Ready 1
(/DR1)
Data Ready 2
(/DR2)
Data Enable 1
(/OE1)
Data Enable 2
(/OE2)
Receiver Select
(SEL)
XXXXXXX
XXX
XXX
XXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXX
Data Bus (out)
(D0 - D15)
Word 1
Word 2
Word 1
Word 2
DR2 HIGH indicates
RX2 is empty
User Reads Word 1 and
Word 2 from RX2
DR1 HIGH indicates RX1
is Empty
User reads Word 1 and Word
2 from RX1
DR2 LOW indicates reception
of valid data from RX2
DR1 LOW indicates RX1 is
empty
Figure 6: Typical Receiver Read Sequence
© 2012 Device Engineering Inc.
DS-MW-01117-01 Rev B
02/09/2012
Page 10 of 14
DEIAZ [ Device Engineering Incorporated ]
