Rev. 1.1
37
C8051F410/1/2/3
Digital Supply Current—CPU Active (Normal Mode, fetching instructions from Flash)
Core Supply Current (IDD) VDD = 2.0 V:
F = 32 kHz
F = 1 MHz
F = 25 MHz
F = 50 MHz
VDD = 2.5 V:
F = 32 kHz
F = 1 MHz
F = 25 MHz
F = 50 MHz
—
13
0.30
5.5
9.5
17
0.43
8.3
13.5
30
0.5
6.5
12
40
0.65
9.5
15
A
mA
A
mA
F = 25 MHz
F = 1 MHz
—
114
100
—
%/V
Frequency Sensitivity (IDD) VDD = 2.0 V:
F < 15 MHz, T = 25 C
F > 15 MHz, T = 25 C
VDD = 2.5 V:
F < 15 MHz, T = 25 C
F > 15 MHz, T = 25 C
—
0.27
0.16
0.39
0.2
—
mA/MHz
Table 3.1. Global DC Electrical Characteristics (Continued)
–40 to +85 °C, 50 MHz System Clock unless otherwise specified. Typical values are given at 25 °C
Parameter
Conditions
Min
Typ
Max
Units
Notes:
1. For more information on VREGIN characteristics, see Table 8.1 on page 82.
2.
VIO must be equal to or greater than VDD.
3. The Backup Supply Voltage (VRTC-BACKUP) is used to power the smaRTClock peripheral only.
4. SYSCLK is the internal device clock. For operational speeds in excess of 25 MHz, SYSCLK must
be derived from the internal clock multiplier.
5. SYSCLK must be at least 32 kHz to enable debugging.
6. Based on device characterization data, not production tested.
7. Active and Inactive IDD at voltages and frequencies other than those specified can be calculated
using the IDD Supply Sensitivity. For example, if the VDD is 2.2 V instead of 2.0 V at 25 MHz:
IDD = 5.5 mA typical at 2.0 V and f = 25 MHz. From this, IDD = 5.5 mA + 1.14 x
(2.2 V – 2.0 V) = 5.73 mA at 2.2 V and f = 25 MHz.
8. IDD can be estimated for frequencies < 15 MHz by simply multiplying the frequency of interest by the
frequency sensitivity number for that range. When using these numbers to estimate IDD for >
15 MHz, the estimate should be the current at 25 MHz minus the difference in current indicated by
the frequency sensitivity number. For example: VDD = 2.0 V; F = 20 MHz,
IDD = 5.5 mA – (25 MHz – 20 MHz) x 0.16 mA/MHz = 4.7 mA.
9. Idle IDD can be estimated for frequencies < 1 MHz by simply multiplying the frequency of interest by
the frequency sensitivity number for that range. When using these numbers to estimate Idle for >
1 MHz, the estimate should be the current at 25 MHz minus the difference in current indicated by
the frequency sensitivity number. For example: VDD = 2.0 V; F = 5 MHz, Idle
IDD = 2.8 mA – (25 MHz – 5 MHz) x 0.1 mA/MHz = 0.8 mA.