SILABS C8051F920-GQ Single/dual battery, 0.9-3.6 v, 32 kb, smartclock, 10-bit adc mcu Datasheet

C8051F920
Single/Dual Battery, 0.9-3.6 V, 32 kB, smaRTClock, 10-Bit ADC MCU
Supply Voltage: 0.9 to 3.6 V
- One-cell mode supports 0.9–1.8 V operation
- Two-cell mode supports 1.8–3.6 V operation
- Built-in dc-dc converter with 1.8 –3.3 V output (65 mW max) for
use in one-cell mode; can supply external devices
- Typical sleep mode current < 0.1 µA; retains state and RAMcontents over full supply range; fast wakeup
- 2 built-in brown-out detectors cover sleep and active modes
10-Bit Analog to Digital Converter
- Up to 300 ksps
- Up to 23 external inputs
- External pin or internal VREF (no external capacitor required)
- Built-in temperature sensor
- External conversion start input option
- Autonomous Burst Mode with 16-bit automatic averaging 
accumulator
Two Comparators
- Programmable hysteresis and response time
- Configurable as interrupt or reset source
- Low current (< 0.5 µA)
- Up to 23 Capacitive Touch Sense inputs
High-Speed 8051 µC Core
- Pipe-lined instruction architecture; executes 70% of instructions
in 1 or 2 system clocks
- 25 MIPS peak throughput with 25 MHz clock
- Expanded interrupt handler
Digital Peripherals
- 24 port I/O; All 5 V tolerant with programmable drive strength
- Hardware enhanced UART, SPI and SMBus™ serial ports
available concurrently
- Low power 32-bit smaRTClock (0.5 uA) operates down to 0.9V
- Four general purpose 16-bit counter/timers
- 16-bit programmable counter array (PCA) with six capture/compare modules and watchdog timer:
• 8, 9, 10, 11, or 16-bit PWM
• Rising/falling edge capture
• Frequency output
• Software timer
Clock Sources
- Precision internal oscillators: 24.5 MHz with ±2% accuracy supports UART operation; spread-spectrum mode for reduced EMI
-
Memory
- 4352 bytes internal data RAM (256 + 4K)
- 32 kB bytes Flash; In-system programmable in 1024-byte 
Low power internal oscillator: 20 MHz
External oscillator: Crystal, RC, C, CMOS clock
smaRTClock oscillator: 32.768 kHz crystal or self-oscillate
Can switch between clock sources on-the-fly; useful in power
saving modes
Ultra-Small Package Options
- 32-pin QFN (5x5 mm)
- 32-pin LQFP (9x9 mm)
sectors; Full read/write/erase functionality over the entire
supply range
- External memory interface (multiplexed address/data)
On-Chip Debug
- On-chip debug circuitry facilitates full speed, non-intrusive in-
Temperature Range: –40 to +85 °C
system debug (no emulator required)
Wake
Reset
Debug /
Programming
Hardware
C2CK/RST
Power Net
Analog
Power
UART
256 Byte SRAM
Timers 0,
1, 2, 3
4096 Byte XRAM
GND/DC-
VBAT
DC/DC
Converter
XTAL1
XTAL2
XTAL4
Digital
Power
External
Oscillator
Circuit
smaRTClock
Oscillator
SPI 0,1
Crossbar Control
SFR
Bus
Analog Peripherals
6-bit
IREF
IREF0
Internal
External
VREF
VREF
A
M
U
X
10-bit
300ksps
ADC
Low-Voltage/Low-Power
VDD
VREF
Temp
Sensor
GND
CP0, CP0A
System Clock
Configuration
Port 2
Drivers
P2.0/A8
P2.1/A9
P2.2/A10
P2.3/A11
P2.4/ALE
P2.5/RD
P2.6/WR
P2.7/C2D
SMBus
SYSCLK
Low Power
20 MHz
Oscillator
Port 1
Drivers
P1.0/AD0
P1.1/AD1
P1.2/AD2
P1.3/AD3
P1.4/AD4
P1.5/AD5
P1.6/AD6
P1.7/AD7
Priority
Crossbar
Decoder
PCA/
WDT
CRC
Engine
Precision
24.5 MHz
Oscillator
GND
XTAL3
VREG
Port 0
Drivers
P0.0/VREF
P0.1/AGND
P0.2/XTAL1
P0.3/XTAL2
P0.4/TX
P0.5/RX
P0.6/CNVSTR
P0.7/IREF0
Digital Peripherals
32k Byte ISP Flash
Program Memory
C2D
VDD/DC+
Port I/O Configuration
CIP-51 8051
Controller Core
Power On
Reset/PMU
CP1, CP1A
+
-
+
-
Comparators
Copyright © 2008 by Silicon Laboratories
11.11.2008
C8051F920
Single/Dual Battery, 0.9-3.6 V, 32 kB, smaRTClock, 10-Bit ADC MCU
Selected Electrical Specifications
(At 25 C°)
Parameter
Supply Input Voltage
two-cell mode
one-cell mode
DC-DC Boost Converter Output
Power (VOUT = 1.8–3.3 V)
Conditions
Min
Typ
Max
Units
DC-DC converter disabled
DC-DC converter enabled
1.8
0.9
—
—
3.6
1.8
V
V
Includes on and off-chip current
—
—
65
mW
—
4.1
—
mA
—
—
DC
—
—
50
0.6
—
2
10
—
—
25
—
—
nA
µA
MHz
µs
µs
24
18
24.5
20
25
22
MHz
MHz
—
—
10
300
bits
ksps
VDD = 1.8–3.6 V
Clock = 24.5 MHz
(±2% internal precision oscillator)
Sleep mode; smaRTClock off
Sleep mode; smaRTClock running
Supply Current with CPU Active
Supply Current (shutdown)
(VBAT = 1.8 V)
Clock Frequency Range
two-cell mode
one-cell mode
Internal Oscillator
Precision oscillator
Low power oscillator
A/D Converter
Wakeup Time
Frequency
Resolution
Throughput Rate
Package Information: 32-Pin LQFP
Package Information: 32-Pin QFN
Bottom View
16
15
14
13
12
11
9
10
E/2
R
17
18
D2 / 2
e
6
19
20
D2
5
21
4
E2 / 2
23
25
26
27
28
30
24
31
1
32
Pin #1 ID
22
E2
2
29
D/2
3
D
7
7xe
b
L
8
7xe
E
e
MM
TYP
0.9
0.02
0.65
0.25
0.25
5.00
2.70
5.00
2.70
0.50
0.40
32
8
8
—
MAX
1.00
0.05
1.00
—
0.30
—
3.25
—
3.25
—
0.50
—
—
—
—
A
MM
A
A1
A2
b
c
D
D1
e
A1
A3
A2
Side View
A
A1
A2
A3
b
D
D2
E
E2
e
L
N
ND
NE
R
MIN
0.80
0.00
0
—
0.18
—
1.25
—
1.25
—
0.30
—
—
—
0.09
MIN
—
0.05
1.35
0.30
0.09
TYP
—
—
1.40
0.37
—
9.00 BSC
7.00 BSC
0.80 BSC
MAX
1.60
0.15
1.45
0.45
0.20
MIN
E
E1
L
aaa
bbb
ccc
ddd

0.45
0°
TYP
9.00 BSC
7.00 BSC
0.60
0.20
0.20
0.10
0.20
3.5°
MAX
0.75
7°
C8051F9xx Product Family
Device Part #
Package Flash Size RAM Size
C8051F930-GQ
C8051F930-GM
C8051F931-GM
C8051F920-GQ
C8051F920-GM
C8051F921-GM
Low-Voltage/Low-Power
32-pin LQFP
32-pin QFN
24-pin QFN
32-pin LQFP
32-pin QFN
24-pin QFN
64 kB
64 kB
64 kB
32 kB
32 kB
32 kB
4 kB
4 kB
4 kB
4 kB
4 kB
4 kB
Copyright © 2008 by Silicon Laboratories
11.11.2008
Silicon Laboratories and Silicon Labs are trademarks of Silicon Laboratories Inc.
Other products or brandnames mentioned herein are trademarks or registered trademarks of their respective holders
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