C8051F850-B-GM Datasheet, PDF (21/290 Pages) Silicon Laboratories – Low-Cost 8-bit MCU Family with up to 8 kB of Flash

C8051F85x/86x
C2CK/RST
Power On
Reset
Reset
Debug /
Programming
Hardware
C2D
CIP-51 8051
Controller Core
8k Byte ISP Flash
Program Memory
256 Byte SRAM
256 Byte XRAM
VDD
GND
Power Net
Independent
Watchdog Timer
SYSCLK ^SFR
Bus
EXTCLK
24.5 MHz
2%
Oscillator
Low-Freq.
Oscillator
CMOS
Oscillator
Input
System Clock
Configuration
Port I/O Configuration
Digital Peripherals
UART
Timers 0,
1, 2, 3
3-ch PCA
I2C /
SMBus
SPI
CRC
Priority
Crossbar
Decoder
Crossbar Control
Analog Peripherals
Internal
Reference
VDD
VREF
12/10 bit
ADC
A
VDD
M
U
X
Temp
Sensor
+-+-
2 Comparators
Port 0
Drivers
Port 1
Drivers
Port 2
Driver
Figure 2.1. C8051F85x/86x Family Block Diagram (QSOP-24 Shown)
P0.0/VREF
P0.1/AGND
P0.2
P0.3/EXTCLK
P0.4/TX
P0.5/RX
P0.6/CNVSTR
P0.7
P1.0
P1.1
P1.2
P1.3
P1.4
P1.5
P1.6
P1.7
P2.0/C2D
P2.1
Preliminary Rev 0.6
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