C8051F966-A-GQ Silicon Labs, C8051F966-A-GQ Datasheet - Page 315
C8051F966-A-GQ
Manufacturer Part Number
C8051F966-A-GQ
Description
8-bit Microcontrollers - MCU 32KB DC-DC LCD AES
Manufacturer
Silicon Labs
Datasheet
1.C8051F960-A-GQ.pdf
(492 pages)
Specifications of C8051F966-A-GQ
Rohs
yes
Core
8051
Processor Series
C8051
Data Bus Width
8 bit
Maximum Clock Frequency
24.5 MHz
Program Memory Size
32 KB
Data Ram Size
8 KB
On-chip Adc
Yes
Operating Supply Voltage
1.8 V to 3.8 V
Operating Temperature Range
- 40 C to + 85 C
Package / Case
QFP-80
Mounting Style
SMD/SMT
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Part Number:
C8051F966-A-GQ
Manufacturer:
Silicon Laboratories Inc
Quantity:
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25.3. Programmable Pull-Up Resistors
The Pulse Counter features low-power pull-up resistors with a programmable resistance and duty-cycle.
The average pull-up current will depend on the selected resistor, sample rate, and pull-up duty-cycle multi-
plier. Example code is available that will calculate the values for the Pull-Up configuration SFR (PC0PCF).
Table 25.1through Table 25.3 are used with Equation 25.1 to calculate the average pull-up resistor current.
Table 25.4through Table 25.7 give the average current for all combinations.
Where:
I
D
D
R
SR
PU
= Pull-up Resistor current selected by PC0PCF[4:2].
= Sample Rate Duty Cycle Multiplier selected by PC0MD[5:4].
= Pull-Up Duty Cycle Multiplier selected by PC0PCF[4:2].
Table 25.2. Sample Rate Duty-Cycle Multiplier
Table 25.3. Pull-Up Duty-Cycle Multiplier
Equation 25.1. Average Pull-Up Current
Table 25.1. Pull-Up Resistor Current
I pull-up
PC0PCF[4:2]
PC0PCF[4:2]
PC0MD[5:4]
000
001
010
100
101
000
001
010
000
001
010
011
110
111
011
011
=
I R D SR
Rev. 0.5
D PU
256 A
16 A
64 A
1 mA
4 mA
1 A
4 A
D
D
1/2
1/4
1/8
1/4
3/8
1/2
3/4
I
0
1
SR
PU
R
C8051F96x
315
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