參數(shù)資料
型號(hào)： GMS97L54
英文描述： 8-Bit CMOS Microcontroller(8位CMOS 微控制器)
中文描述： 8位CMOS微控制器（8位的CMOS微控制器）
文件頁(yè)數(shù)： 32/59頁(yè)
文件大?。?/td> 812K
代理商： GMS97L54
1) Capacitive loading on ports 0 and 2 may cause spurious noise pulses to be superimposed on the
V
OL
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 ports0 and 2 may cause the
V
OH
on ALE and PSEN to momentarily fall below
the 0.9V
CC
specification when the address lines are stabilizing.
3)
I
PD
(Power Down Mode) is measured under following conditions:
EA = Port0 =
V
CC
; RESET =
V
SS
; XTAL2 = N.C.; XTAL1 =
V
SS
; all other pins are disconnected.
4)
I
CC
(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 = Port0 = RESET =
V
CC
; all other pins are disconnected.
I
CC
would be slightly higher if a crystal
oscillator is used (appr. 1mA).
5)
I
CC
(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)
I
CC max
at other frequencies is given by:
active mode:
I
CC
= 1.27
f
OSC
+ 5.73
idle mode:
I
CC
= 0.28
f
OSC
+ 1.45 (except OTP devices)
where
f
OSC
is the oscillator frequency in MHz.
I
CC
values are given in mA and measured at
V
CC
= 5V.
GMS90 Series
8-Bit CMOS Microcontroller
LG Semicon MCU
32
MAY. 1998
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