C8051F99X Datasheet PDF - Silicon Laboratories
| Part Number | C8051F99X | |
| Description | (C8051F98X / C8051F99X) Capacitive Sensing MCU | |
| Manufacturers | Silicon Laboratories | |
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C8051F99x-C8051F98x
Ultra Low Power, 8-2 kB Flash, Capacitive Sensing MCU
Ultra Low Power Consumption
- 150 µA/MHz in active mode (24.5 MHz clock)
- 2 µs wakeup time
- 10 nA sleep mode with memory retention
- 50 nA sleep mode with brownout detector
- 300 nA sleep mode with LFO
- 600 nA sleep mode with external crystal
Supply Voltage 1.8 to 3.6 V
- Built-in LDO regulator allows a high analog supply
voltage and low digital core voltage
- 2 built-in supply monitors (brownout detector) for
sleep mode and active modes
12-Bit or 10-Bit Analog to Digital Converter
- ±1 LSB INL (10-bit mode); ±1.5 LSB INL
(12-bit mode) no missing codes
- Programmable throughput up to 300 ksps
(10-bit mode) or 75 ksps (12-bit mode)
- Up to 10 external inputs
- On-chip voltage reference; 0.5x gain allows measur-
ing voltages up to twice the reference voltage
- 16-bit auto-averaging accumulator with burst mode
provides increased ADC resolution
- Data dependent windowed interrupt generator
- Built-in temperature sensor
Capacitive Sense Interface (F99x)
- Supports buttons, sliders, wheels, and capacitive
proximity sensing
- Fast 40 µs per channel conversion time
- 16-bit resolution, up to 14 input channels
- Auto scan and wake-on-touch
- Auto-accumulate up to 64x samples
Analog Comparator
- Programmable hysteresis and response time
- Configurable as wake-up or reset source
6-Bit Programmable Current Reference
- Up to ±500 µA, can be used as a bias or for
generating a custom reference voltage
- PWM enhanced resolution mode
High-Speed 8051 µC Core
- Pipelined instruction architecture; executes 70% of
instructions in 1 or 2 system clocks
- Up to 25 MIPS throughput with 25 MHz clock
- Expanded interrupt handler
Memory
- 512 bytes RAM
- 8 kB (F990/1/6/7, F980/1/6/7), 4 kB (F982/3/8/9), or
2 kB (F985) Flash; in-system programmable
Digital Peripherals
- Up to 17 port I/O; high sink current and
programmable drive strength
Hardware SMBus™/I2C™, SPI™, and UART serial
ports available concurrently
- Four general purpose 16-bit counter/timers
- Programmable 16-bit counter/timer array with three
capture/compare modules and watchdog timer
Clock Sources
- Internal oscillators: 24.5 MHz, 2% accuracy
supports UART operation; 20 MHz low power
oscillator requires very little bias current.
- External oscillator: Crystal, RC, C, or CMOS Clock
- SmaRTClock oscillator: 32 kHz Crystal or internal
- Can switch between clock sources on-the-fly; useful
in implementing various power saving modes
On-Chip Debug
- On-chip debug circuitry facilitates full-speed, non-
intrusive in-system debug (no emulator required)
- Provides breakpoints, single stepping
- Inspect/modify memory and registers
- Complete development kit
Packages
- 20-pin QFN (3 x 3 mm)
- 24-pin QFN (4 x 4 mm)
- 24-pin QSOP (easy to hand-solder)
Temperature Range: –40 to +85 °C
ANALOG PERIPHERALS
DIGITAL I/O
A 12/10-bit
M 75/300 ksps IREF
U
X
ADC
TEMP
VREF
SENSOR VREG
Capacitive
Sense
+
–
VOLTAGE
COMPARATOR
UART
SMBus
SPI
PCA
Timer 0
Timer 1
Timer 2
Timer 3
CRC
Port 0
Port 1
Port 2
24.5 MHz PRECISION
INTERNAL OSCILLATOR
20 MHz LOW POWER
INTERNAL OSCILLATOR
External Oscillator
HARDWARE smaRTClock
HIGH-SPEED CONTROLLER CORE
8/4/2 kB
ISP FLASH
FLEXIBLE
INTERRUPTS
8051 CPU
(25 MIPS)
DEBUG
CIRCUITRY
512B SRAM
POR WDT
Rev. 1.0 11/10
Copyright © 2010 by Silicon Laboratories
C8051F99x-C8051F98x
www.DataSheet.in
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C8051F99x-C8051F98x
19.2.Low Power Internal Oscillator......................................................................... 187
19.3.External Oscillator Drive Circuit...................................................................... 187
19.3.1.External Crystal Mode............................................................................ 187
19.3.2.External RC Mode.................................................................................. 189
19.3.3.External Capacitor Mode........................................................................ 190
19.3.4.External CMOS Clock Mode .................................................................. 190
19.4.Special Function Registers for Selecting and Configuring the System Clock 191
20. SmaRTClock (Real Time Clock) .......................................................................... 195
20.1.SmaRTClock Interface ................................................................................... 196
20.1.1.SmaRTClock Lock and Key Functions................................................... 196
20.1.2.Using RTC0ADR and RTC0DAT to Access SmaRTClock
Internal Registers ................................................................................... 197
20.1.3.RTC0ADR Short Strobe Feature............................................................ 197
20.1.4.SmaRTClock Interface Autoread Feature .............................................. 197
20.1.5.RTC0ADR Autoincrement Feature......................................................... 198
20.2.SmaRTClock Clocking Sources ..................................................................... 201
20.2.1.Using the SmaRTClock Oscillator with a Crystal or
External CMOS Clock ............................................................................ 201
20.2.2.Using the SmaRTClock Oscillator in Self-Oscillate Mode...................... 202
20.2.3.Using the Low Frequency Oscillator (LFO) ............................................ 202
20.2.4.Programmable Load Capacitance.......................................................... 203
20.2.5.Automatic Gain Control (Crystal Mode Only) and SmaRTClock
Bias Doubling ......................................................................................... 204
20.2.6.Missing SmaRTClock Detector .............................................................. 206
20.2.7.SmaRTClock Oscillator Crystal Valid Detector ...................................... 206
20.3.SmaRTClock Timer and Alarm Function ........................................................ 206
20.3.1.Setting and Reading the SmaRTClock Timer Value .............................. 206
20.3.2.Setting a SmaRTClock Alarm ................................................................ 207
20.3.3.Software Considerations for using the SmaRTClock Timer and Alarm . 208
21. Port Input/Output.................................................................................................. 213
21.1.Port I/O Modes of Operation........................................................................... 214
21.1.1.Port Pins Configured for Analog I/O....................................................... 214
21.1.2.Port Pins Configured For Digital I/O....................................................... 214
21.1.3.Interfacing Port I/O to 5 V Logic ............................................................. 215
21.1.4.Increasing Port I/O Drive Strength ......................................................... 215
21.2.Assigning Port I/O Pins to Analog and Digital Functions................................ 215
21.2.1.Assigning Port I/O Pins to Analog Functions ......................................... 215
21.2.2.Assigning Port I/O Pins to Digital Functions........................................... 216
21.2.3.Assigning Port I/O Pins to External Digital Event Capture Functions .... 216
21.3.Priority Crossbar Decoder .............................................................................. 217
21.4.Port Match ...................................................................................................... 223
21.5.Special Function Registers for Accessing and Configuring Port I/O .............. 225
22. SMBus ................................................................................................................... 233
22.1.Supporting Documents ................................................................................... 234
22.2.SMBus Configuration...................................................................................... 234
www.DataSheet.in
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