5.4 Active Mode Supply Current Into VCC Excluding External Current
over recommended operating free-air temperature (unless otherwise noted)(1)(2)(3)PARAMETER | EXECUTION MEMORY | VCC | Frequency (fMCLK = fSMCLK) | UNIT |
1 MHz | 4 MHz | 8 MHz |
TYP | MAX | TYP | MAX | TYP | MAX |
IAM, FRAM_UNI(5) |
FRAM |
3 V |
0.27 |
|
0.58 |
|
1.0 |
|
mA |
IAM,0%(6) |
FRAM 0% cache hit ratio |
3 V |
0.42 |
0.73 |
1.2 |
1.6 |
2.2 |
2.8 |
mA |
IAM,50%(6)(4) |
FRAM 50% cache hit ratio |
3 V |
0.31 |
| 0.73 |
| 1.3 |
| mA |
IAM,66%(6)(4) |
FRAM 66% cache hit ratio |
3 V |
0.27 |
| 0.58 |
| 1.0 |
| mA |
IAM,75%(6)(4) |
FRAM 75% cache hit ratio |
3 V |
0.25 |
| 0.5 |
| 0.82 |
| mA |
IAM,100%(6)(4) |
FRAM 100% cache hit ratio |
3 V |
0.2 |
0.43 |
0.3 |
0.55 |
0.42 |
0.8 |
mA |
IAM, RAM(4)(7) |
RAM |
3 V |
0.2 |
0.4 |
0.35 |
0.55 |
0.55 |
0.75 |
mA |
(1) All inputs are tied to 0 V or to VCC. Outputs do not source or sink any current.
(2) The currents are characterized with a Micro Crystal CC4V-T1A SMD crystal with a load capacitance of 9 pF. The internal and external load capacitance are chosen to closely match the required 9 pF.
(3) Characterized with program executing typical data processing.
(4) See
Figure 5-1 for typical curves. Each characteristic equation shown in the graph is computed using the least squares method for best linear fit using the typical data shown in
.
f
ACLK = 32786 Hz, f
MCLK = f
SMCLK at specified frequency. No peripherals active.
XTS = CPUOFF = SCG0 = SCG1 = OSCOFF= SMCLKOFF = 0.
(5) Program and data reside entirely in FRAM. No wait states enabled. DCORSEL = 0, DCOFSELx = 3 (fDCO = 8 MHz). MCLK = SMCLK.
(6) Program resides in FRAM. Data resides in SRAM. Average current dissipation varies with cache hit-to-miss ratio as specified. Cache hit ratio represents number cache accesses divided by the total number of FRAM accesses. For example, a 25% ratio implies one of every four accesses is from cache, the remaining are FRAM accesses.
For 1, 4, and 8 MHz, DCORSEL = 0, DCOFSELx = 3 (fDCO = 8 MHz). MCLK = SMCLK. No wait states enabled.
(7) All execution is from RAM.
For 1, 4, and 8 MHz, DCORSEL = 0, DCOFSELx = 3 (fDCO = 8 MHz). MCLK = SMCLK.