High-Performance SAB 80C517A/83C517A-5 8-Bit CMOS Single ...

SAB 80C517A/83C517A-5Notes for page 62:1) Capacitive loading on ports 0 and 2 may cause spurious noise pulses to be superimposedon the V OL of ALE and ports 1, 3, 4, 5 and 6. The noise is due to external bus capacitancedischarging into the port 0 and port 2 pins when these pins make 1-to-0 transitions duringbus operation. In the worst case (capacitive loading > 100 pF), the noise pulse on ALE linemay exceed 0.8 V. In such cases it may be desirable to qualify ALE with a schmitt-trigger,or use an address latch with a schmitt-trigger strobe input.2) Capacitive loading on ports 0 and 2 may cause the V OH on ALE and PSEN to momentarilyfall below the 0.9 V CC specification when the address lines are stabilizing.3) I PD (Power down mode) is measured with:EA = RESET = V CC; Port0 = Port7 = Port8 = V CC ; XTAL1 = N.C.; XTAL2 = V SS ;PE/SWD = OWE = V SS ;HWDP = V CC (Software Power Down mode); V ARef = V CC ;V AGND = V SS ; all other pins are disconnected. Hardware Powerdown I PD : OWE =V CCor V SS . No certain pin connection for the other pins.4) I CC (active mode) is measured with:XTAL2 driven with t CLCH, t CHCL = 5 ns, V IL = V SS + 0.5 V, V IH = V CC – 0.5 V; XTAL1 = N.C.;EA = PE/SWD = V CC ; Port0 = Port7 = Port8 = V CC ; HWPD = V CC ; RESET = V SSall other pins are disconnected. I CC would be slightly higher if a crystal oscillator isused (appr. 1 mA).5) I CC (Idle mode) is measured with all output pins disconnected and with all peripheralsdisabled; XTAL2 driven with t CLCH , t CHCL = 5 ns, V IL = V SS + 0.5 V, V IH = V CC – 0.5 V;XTAL1 = N.C.; RESET = V CC ; HWPD = V CC ; Port0 = Port7 = Port8 =V CC ;EA = PE/SWD = V SS ; all other pins are disconnected;6) I CC (slow down mode) is measured with all output pins disconnected and with all peripheralsdisabled; XTAL2 driven with t CLCH, t CHCL = 5 ns, V IL = V SS + 0.5 V, V IH =V CC – 0.5 V;XTAL1 = N.C.;RESET= V CC ; HWPD = V CC ; Port7 = Port8 = V CC ; EA = PE/SWD = V SS ;all other pins are disconnected;7) I CCMax at other frequencies is given by:active mode: I CC (max) = 1.50* f OSC + 10idle mode: I CC (max) = 1.17* f OSC + 10where f OSC is the oscillator frequency in MHz. I CC values are given in mA andmeasured at V CC = 5 V.Semiconductor Group 64