C8051F321R Silicon Laboratories Inc, C8051F321R Datasheet - Page 4

• Manufacturer Part Number: C8051F321R
• Description: IC 8051 MCU 16K FLASH 28MLP
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F32xr

Specifications of C8051F321R

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: SMBus (2-Wire/I²C), SPI, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
• Number Of I /o: 21
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 2.25K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 13x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-VQFN Exposed Pad, 28-HVQFN, 28-SQFN, 28-DHVQFN
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: 336-1067-2

C8051F320/1
10. RESET SOURCES ..............................................................................................................99
11. FLASH MEMORY ............................................................................................................107
12. EXTERNAL RAM .............................................................................................................113
13. OSCILLATORS...................................................................................................................117
14. PORT INPUT/OUTPUT ...................................................................................................127
4
9.3. Interrupt Handler .............................................................................................................87
9.4. Power Management Modes .............................................................................................96
10.1. Power-On Reset.............................................................................................................100
10.2. Power-Fail Reset / VDD Monitor..................................................................................101
10.3. External Reset................................................................................................................102
10.4. Missing Clock Detector Reset .......................................................................................102
10.5.Comparator0 Reset ........................................................................................................102
10.6.PCA Watchdog Timer Reset .........................................................................................102
10.7. FLASH Error Reset .......................................................................................................102
10.8. Software Reset...............................................................................................................103
10.9. USB Reset .....................................................................................................................103
11.1. Programming The FLASH Memory .............................................................................107
11.2. Non-volatile Data Storage .............................................................................................109
11.3. Security Options ............................................................................................................109
12.1. Accessing User XRAM .................................................................................................113
12.2.Accessing USB FIFO Space..........................................................................................114
13.1. Programmable Internal Oscillator .................................................................................117
13.2.External Oscillator Drive Circuit...................................................................................120
13.3.4x Clock Multiplier .......................................................................................................123
13.4. System and USB Clock Selection .................................................................................124
14.1. Priority Crossbar Decoder .............................................................................................129
9.2.7. Register Descriptions .............................................................................................84
9.3.1. MCU Interrupt Sources and Vectors .....................................................................87
9.3.2. External Interrupts .................................................................................................88
9.3.3. Interrupt Priorities..................................................................................................88
9.3.4. Interrupt Latency....................................................................................................88
9.3.5. Interrupt Register Descriptions ..............................................................................90
9.4.1. Idle Mode ...............................................................................................................96
9.4.2. Stop Mode..............................................................................................................96
11.1.1. FLASH Lock and Key Functions ........................................................................107
11.1.2. FLASH Erase Procedure......................................................................................107
11.1.3. FLASH Write Procedure .....................................................................................108
13.1.1. Programming the Internal Oscillator on C8051F320/1 Devices .........................118
13.1.2. Internal Oscillator Suspend Mode .......................................................................118
13.2.1. Clocking Timers Directly Through the External Oscillator ................................120
13.2.2. External Crystal Example ....................................................................................120
13.2.3. External RC Example ..........................................................................................121
13.2.4. External Capacitor Example ................................................................................121
13.4.1. System Clock Selection .......................................................................................124
13.4.2. USB Clock Selection ...........................................................................................124
Rev. 1.1