C8051F966-A-GQ Silicon Labs, C8051F966-A-GQ Datasheet - Page 277

• Manufacturer Part Number: C8051F966-A-GQ
• Description: 8-bit Microcontrollers - MCU 32KB DC-DC LCD AES
• Manufacturer: Silicon Labs

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

21. Voltage Regulator (VREG0)
C8051F96x devices include an internal voltage regulator (VREG0) to regulate the internal core supply to
1.8 V from a VDD/DC+ supply of 1.8 to 3.6 V. Electrical characteristics for the on-chip regulator are speci-
fied in the Electrical Specifications chapter.
The REG0CN register allows the Precision Oscillator Bias to be disabled, reducing supply current in all
non-sleep power modes. This bias should only be disabled when the precision oscillator is not being used.
The internal regulator (VREG0) is disabled when the device enters sleep mode and remains enabled when
the device enters suspend mode. See Section “19. Power Management” on page 257 for complete details
about low power modes.
SFR Definition 21.1. REG0CN: Voltage Regulator Control
SFR Page = 0x0; SFR Address = 0xC9
21.1. Voltage Regulator Electrical Specifications
See Table 4.17 on page 75 for detailed Voltage Regulator Electrical Specifications.
Name
Reset
Type
Bit
7:5
3:0
Bit
4
OSCBIAS Precision Oscillator Bias.
Reserved Read = 000b. Must Write 000b.
Reserved Read = 0000b. Must Write 0000b.
Name
R/W
7
0
When set to 1, the bias used by the precision oscillator is forced on. If the precision
oscillator is not being used, this bit may be cleared to 0 to to save supply current in
all non-Sleep power modes.
R/W
6
0
R/W
5
0
OSCBIAS
R/W
Rev. 0.5
4
1
Function
R/W
3
0
R/W
2
0
C8051F96x
R/W
1
0
R/W
0
0
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