AT INTERFACE DESCRIPTION

5 – 3

TIMING PARAMETERS MODE 0 MODE 1 MODE 2 MODE 3 MODE 4
t0 Cycle Time (min ) 600 ns 383 ns 240 ns 180 ns 120 ns
t1 Address valid to DIOR-/DIOW- setup (min) 70 ns 50 ns 30 ns 30 ns 25 ns
t2 DIOR-/D IOW- 16- bi t (m in) 165 ns 125 ns 100 ns 8 0 ns 7 0 ns
t2i DIOR-/DIOW- recovery time (min) 70 ns 25 ns
t3 DIOW- data setup (min) 60 ns 45 ns 30 ns 30 ns 20 ns
t4 DIOW- dat a hol d ( min ) 30 ns 20 ns 1 5 ns 1 0 ns 10 ns
t5 DIOR- data setup (min) 50 ns 35 ns 20 ns 20 ns 20 ns
t6 DIOW- data hold (min ) 5 ns 5 ns 5 ns 5 ns 5 ns
t6Z DIOR- data tristate (max) 30 ns 30 ns 30 ns 30 ns 30 ns
t9 DIOR-/DIOW- to address valid hold (min) 20 ns 15 ns 10 ns 10 ns 10 ns
tRd Read Data Valid to IORDY active (min) 0 0 0 0 0
tA IORDY Setup Time 35 ns 35 ns 35 ns 35 ns 35 ns
tB IORDY Pulse Width (max) 1250 ns 1250 ns 1250 ns 1250 ns 1250 ns
PIO TimingPIO TimingPIO TimingPIO TimingPIO Timing

Figure 5 - 2

PIO Data Transfer To/From Device