C8051F930-GQ Silicon Laboratories Inc, C8051F930-GQ Datasheet - Page 156

• Manufacturer Part Number: C8051F930-GQ
• Description: IC 8051 MCU 64K FLASH 32-LQFP
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F9xxr

Specifications of C8051F930-GQ

• Program Memory Type: FLASH
• Program Memory Size: 64KB (64K x 8)
• Package / Case: 32-LQFP
• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: SMBus (2-Wire/I²C), SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
• Number Of I /o: 24
• Ram Size: 4.25K x 8
• Voltage - Supply (vcc/vdd): 0.9 V ~ 3.6 V
• Data Converters: A/D 23x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: C8051F9x
• Core: 8051
• Data Bus Width: 8 bit
• Data Ram Size: 4.25 KB
• Interface Type: I2C/SMBus/SPI/UART
• Maximum Clock Frequency: 25 MHz
• Number Of Programmable I/os: 24
• Number Of Timers: 4
• Operating Supply Voltage: 0.9 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Development Tools By Supplier: C8051F930DK
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 23-ch x 10-bit
• No. Of I/o's: 24
• Ram Memory Size: 4KB
• Cpu Speed: 25MHz
• No. Of Timers: 4
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 336-1478 - PLATFORM PROG TOOLSTCK F920,F930336-1477 - PLATFORM PROG TOOLSTCK F920,F930336-1473 - KIT DEV C8051F920,F921,F930,F931336-1472 - BOARD TARGET/PROTO W/C8051F930
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1466

C8051F93x-C8051F92x
14. Power Management
C8051F93x-C8051F92x devices support 5 power modes: Normal, Idle, Stop, Suspend, and Sleep. The
power management unit (PMU0) allows the device to enter and wake-up from the available power modes.
A brief description of each power mode is provided in Table 14.1. Detailed descriptions of each mode can
be found in the following sections.
In battery powered systems, the system should spend as much time as possible in sleep mode in order to
preserve battery life. When a task with a fixed number of clock cycles needs to be performed, the device
should switch to normal mode, finish the task as quickly as possible, and return to sleep mode. Idle mode
and suspend modes provide a very fast wake-up time; however, the power savings in these modes will not
be as much as in sleep Mode. Stop Mode is included for legacy reasons; the system will be more power
efficient and easier to wake up when idle, suspend, or sleep mode are used.
Although switching power modes is an integral part of power management, enabling/disabling individual
peripherals as needed will help lower power consumption in all power modes. Each analog peripheral can
be disabled when not in use or placed in a low power mode. Digital peripherals such as timers or serial
busses draw little power whenever they are not in use. Digital peripherals draw no power in Sleep Mode.
156
Power Mode
Normal
Idle
Stop
Suspend
Sleep
Device fully functional
All peripherals fully functional.
Very easy to wake up.
Legacy 8051 low power mode.
A reset is required to wake up.
Similar to Stop Mode, but very fast
wake-up time and code resumes
execution at the next instruction.
Ultra Low Power and flexible
wake-up sources. Code resumes
execution at the next instruction.
Comparator0 only functional in
two-cell mode.
Description
Table 14.1. Power Modes
Rev. 1.1
SmaRTClock,
SmaRTClock,
Comparator0,
Comparator0,
Any Interrupt.
Port Match,
Port Match,
Any Reset.
Wake-Up
Sources
RST pin.
RST pin.
N/A
All Internal Oscillators Disabled
All Oscillators except SmaRT-
Precision Oscillator Disabled
Power Supply Gated
System Clock Gated
Excellent MIPS/mW
No Code Execution
No Code Execution
No Code Execution
Power Savings
Clock Disabled
Very Good
Excellent
Good
Good