C8051F986-GUR Silicon Labs, C8051F986-GUR Datasheet - Page 49
C8051F986-GUR
Manufacturer Part Number
C8051F986-GUR
Description
8-bit Microcontrollers - MCU 8kB 512B RAM 12b ADC
Manufacturer
Silicon Labs
Datasheet
1.C8051F986-GUR.pdf
(322 pages)
Specifications of C8051F986-GUR
Rohs
yes
Core
8051
Processor Series
C8051
Data Bus Width
8 bit
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Table 4.2. Global Electrical Characteristics (Continued)
–40 to +85 °C, 25 MHz system clock unless otherwise specified. See "AN358: Optimizing Low Power Operation of the
‘F9xx" for details on how to achieve the supply current specifications listed in this table.
Notes:
1. Based on device characterization data; Not production tested.
2. SYSCLK must be at least 32 kHz to enable debugging.
3. Digital Supply Current depends upon the particular code being executed. The values in this table are obtained
4. Includes oscillator and regulator supply current.
5. IDD can be estimated for frequencies < 14 MHz by simply multiplying the frequency of interest by the
6. Idle IDD can be estimated by taking the current at 25 MHz minus the difference in current indicated by the
with the CPU executing an “sjmp $” loop, which is the compiled form of a while(1) loop in C. One iteration
requires 3 CPU clock cycles, and the Flash memory is read on each cycle. The supply current will vary slightly
based on the physical location of the sjmp instruction and the number of Flash address lines that toggle as a
result. In the worst case, current can increase by up to 30% if the sjmp loop straddles a 64-byte Flash address
boundary (e.g., 0x007F to 0x0080). Real-world code with larger loops and longer linear sequences will have
few transitions across the 64-byte address boundaries.
frequency sensitivity number for that range, then adding an offset of 84 µA. When using these numbers to
estimate I
indicated by the frequency sensitivity number. For example: V
frequency sensitivity number. For example: V
(25 MHz – 20 MHz) x 0.088 mA/MHz = 3.16 mA assuming the same oscillator setting.
5 MHz) x 0.067 mA/MHz = 0.41 mA.
Parameter
DD
for > 14 MHz, the estimate should be the current at 25 MHz minus the difference in current
Conditions
DD
Rev. 1.1
= 3.0 V; F = 5 MHz, Idle I
C8051F99x-C8051F98x
DD
= 3.0 V; F = 20 MHz, I
DD
Min
= 1.75 mA – (25 MHz –
Typ
DD
= 3.6 mA –
Max
Units
49
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