
C515C
Semiconductor Group
56
1997-07-01
Power Supply Current 
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 > 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.
2) Capacitive loading on ports 0 and 2 may cause the 
V
OH
 on ALE and PSEN to momentarily fall below the
0.9 
V
CC
 specification when the address lines are stabilizing.
3)
 I
PD
 (power-down mode) is measured under following conditions:
EA = RESET = Port 0 = Port 6 = 
V
CC
 ; XTAL1 = N.C.; XTAL2 = 
V
SS
 ; PE/SWD = 
V
SS
 ;
HWPD = 
V
CC
 ;
V
AGND
 = 
V
SS
 ; 
V
AREF
 = 
V
CC
 ; all other pins are disconnected.
I
PD
 (hardware power-down mode) is independent of any particular pin connection.
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 = Port 0 = Port 6 = 
V
CC
 ; HWPD = 
V
CC
 ;
RESET = 
V
SS
 ; all other pins are disconnected.
5)
 I
CC
 (idle mode) is measured with all output pins disconnected and with all peripherals disabled;
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
 ;  EA = 
V
SS
 ; Port0 = 
V
CC
 ; all other pins are disconnected; 
6)
 I
CC
 (active mode with slow-down mode) is measured : TBD
7)
 I
CC
 (idle mode with slow-down mode) is measured : TBD
8) Overload conditions occur if the standard operating conditions are exceeded, ie. the voltage on any pin
exceeds the specified range (i.e. 
V
OV
 > 
V
CC
 + 0.5 V or 
V
OV
 < 
V
SS
 - 0.5 V). The supply voltage 
V
CC
 and 
V
SS
 must
remain within the specified limits. The absolute sum of input currents on all port pins may not exceed 50 mA. 
9) Not 100% tested, guaranteed by design characterization
10)The typical 
I
CC
 values are periodically measured at 
T
A
= +25 C and 
V
CC
 = 5 V but not 100% tested.
11)The maximum 
I
CC
 values are measured under worst case conditions (
T
A
= 0 C or -40 C and 
V
CC
 = 5.5 V)
Parameter
Symbol
Limit Values
Unit Test Condition
typ. 
10)
max. 
11)
Active mode
6 MHz
10 MHz
I
CC
I
CC
I
CC
I
CC
I
CC
I
CC
I
CC
I
CC
I
PD
12.0
18.9
16.1
25.5
mA
mA
4)
Idle mode
6 MHz
10 MHz
6.9
10.5
9.8
15
mA
mA
5)
Active mode with 
     slow-down enabled
6 MHz
10 MHz
TBD
TBD
TBD
TBD
mA
mA
6)
Idle mode with 
     slow-down enabled
6 MHz
10 MHz
TBD
TBD
TBD
TBD
mA
mA
μ
A
7)
Power-down mode
TBD
50
V
CC
 = 2
…
5.5 V
 3)