GM82C803CN Datasheet, PDF (84/84 Pages) List of Unclassifed Manufacturers – 2.88 MB FDC/ Dual UARTs with FIFO/PIO(EPP/ ECP)/ IDE Interface/ S-IR/ PnP

GM82C803CN
Parameter
t1 AUTOFD Valid to STROBE Asserted
t2 PDATA Valid to STROBE Asserted
t3 BUSY Deasserted to AUTOFD Changed
t4 BUSY Deasserted to PDATA Changed
t5 STROBE Asserted to BUSY Asserted
t6 STROBE Deasserted to BUSY
t7 Deasserted
t8 BUSY Deasserted to STROBE Asserted
BUSY Asserted to STROBE Deasserted
Min
Max Unit Note
0
60
ns
0
60
ns
80
180
ns
1, 2
80
180
ns
1, 2
0
ns
0
ns
80
200
ns
1, 2
80
180
ns
2
1. Maximum value only applied if there is data in the FIFO waiting to be written out.
2. BUSY is not considered asserted or deasserted until it is stable for a minimum of 75 to 130 ns.
ECP PARALLEL PORT FORWARD TIMING
Parameter
t1 PDATA Valid to ACK Asserted
t2 AUTOFD Deasserted to PDATA Changed
t3 ACK Asserted to AUTOFD Deasserted
t4 ACK Deasserted to AUTOFD Asserted
t5 AUTOFD Asserted to ACK Asserted
t6 AUTOFD Dasserted to ACK Deasserted
Min
0
0
80
80
0
0
Max Unit
ns
ns
200
ns
200
ns
ns
ns
Note
1, 2
2
1. Maximum value only applies if there is room in the FIFO and a terminal count has not been received.
ECP can stall by keeping AUTOFD low.
2. ACK is not considered asserted or deasserted until it is stable for a minimum of 75 to 130 ns.
ECP PARALLEL PORT RECEIVE TIMING