SAB-C501G-1E24N SIEMENS [Siemens Semiconductor Group], SAB-C501G-1E24N Datasheet - Page 32

• Manufacturer Part Number: SAB-C501G-1E24N
• Description: 8-Bit CMOS Microcontroller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Notes:
1)
2)
3)
4)
5)
7)
Semiconductor Group
Capacitive loading on ports 0 and 2 may cause spurious noise pulses to be superimposed on the
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 > 100 pF), the noise
pulse on ALE line may 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.
Capacitive loading on ports 0 and 2 may cause the
I
EA = Port0 = V
I
XTAL1 driven with
EA = Port0 = RESET=
used (appr. 1 mA).
I
XTAL1 driven with
RESET = EA =
I
active mode:
idle mode:
where
0.9
PD
CC
CC
CC max
(Power Down Mode) is measured under following conditions:
(active mode) is measured with:
(Idle mode) is measured with all output pins disconnected and with all peripherals disabled;
V
CC
at other frequencies is given by:
f
OSC
specification when the address lines are stabilizing.
is the oscillator frequency in MHz.
CC
V
I
I
CC
CC
; RESET = V
SS
t
t
; Port0
CLCH
CLCH
= 1.27 x
= 0.28 x
V
,
,
CC
t
t
CHCL
CHCL
; all other pins are disconnected.
= V
f
f
OSC
OSC
SS
= 5 ns,
= 5 ns,
CC
; XTAL2 = N.C.; XTAL1 =
; all other pins are disconnected;
+ 5.73
+ 1.45 (C501-L and C501-1R only)
V
V
IL
IL
=
=
V
V
SS
SS
I
CC
+ 0.5 V,
+ 0.5 V,
values are given in mA and measured at
32
V
OH
V
V
on ALE and PSEN to momentarily fall bellow the
IH
IH
V
=
=
SS
I
CC
V
V
; all other pins are disconnected.
CC
CC
would be slightly higher if a crystal oscillator is
– 0.5 V; XTAL2 = N.C.;
– 0.5 V; XTAL2 = N.C.;
V
CC
= 5 V.
1997-04-01
V
OL
C501
of ALE