GMS90C320 Datasheet, PDF (27/46 Pages) Hynix Semiconductor – HYNIX SEMICONDUCTOR INC. 8-BIT SINGLE-CHIP MICROCONTROLLERS

GMS90C320
1) _{Capacitive loading on ports 0 and 2 may cause spurious noise pulses to be superimposed on the VOL of ALE and port 3. The}
noise is due to external bus capacitance discharging into the port 0 and port 2 pins when these pins make 1-to-0 transitions
during bus operation. In the worst case (capacitive loading: > 50pF at 3.3V, > 100pF at 5V), the noise pulse on ALE line may
exceed 0.8V. 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 VOH on ALE and PSEN to momentarily fall below the 0.9VCC specification}
when the address lines are stabilizing.
3) _{ICC max at other frequencies is given by:}
active mode: I_CC = 1.0 × ƒ_OSC + 3.16
idle mode: I_CC = 0.37 × ƒ_OSC + 3.63
where ƒ_OSC is the oscillator frequency in MHz. I_CC values are given in mA and measured at V_CC = 5V.
4) _{ICC (active mode) is measured with:}
XTAL1 driven with t_CLCH, t_CHCL = 5ns, V_IL = V_SS + 0.5V, V_IH = V_CC - 0.5V; XTAL2 = N.C.;
EA = Port 0 = RESET = V_CC; all other pins are disconnected. I_CC would be slightly higher if a crystal oscillator is used (appr.
1mA).
5) _{ICC (Idle mode) is measured with all output pins disconnected and with all peripherals disabled;}
XTAL1 driven with t_CLCH, t_CHCL = 5ns, V_IL = V_SS + 0.5V, V_IH = V_CC - 0.5V; XTAL2 = N.C.;
RESET = EA = V_SS; Port0 = V_CC; all other pins are disconnected;
6) _{IPD (Power Down Mode) is measured under following conditions:}
EA = Port 0 = V_CC; RESET = V_SS; XTAL2 = N.C.; XTAL1 = V_SS; all other pins are disconnected.
OCT. 2000 Ver 1.2
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