C8051F902-GU Silicon Laboratories Inc, C8051F902-GU Datasheet - Page 208

• Manufacturer Part Number: C8051F902-GU
• Description: IC MCU 8BIT 8KB FLASH 24QSOP
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F9xxr

Specifications of C8051F902-GU

• Program Memory Type: FLASH
• Program Memory Size: 8KB (8K x 8)
• Package / Case: 24-QSOP
• 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: 16
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 0.9 V ~ 3.6 V
• Data Converters: A/D 15x10/12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: C8051F9x
• Core: 8051
• Data Ram Size: 768 B
• Interface Type: UART
• Maximum Clock Frequency: 25 MHz
• 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: C8051F912DK
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12 bit
• Package: 24QSOP
• Device Core: 8051
• Family Name: C8051F90x
• Maximum Speed: 25 MHz
• Data Bus Width: 8 Bit
• Number Of Programmable I/os: 16
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1849-5

C8051F91x-C8051F90x
21.2.2. Assigning Port I/O Pins to Digital Functions
Any Port pins not assigned to analog functions may be assigned to digital functions or used as GPIO. Most
digital functions rely on the Crossbar for pin assignment; however, some digital functions bypass the
Crossbar in a manner similar to the analog functions listed above. Port pins used by these digital func-
tions and any Port pins selected for use as GPIO should have their corresponding bit in PnSKIP set
to 1. Table 21.2 shows all available digital functions and the potential mapping of Port I/O to each digital
function.
21.2.3. Assigning Port I/O Pins to External Digital Event Capture Functions
External digital event capture functions can be used to trigger an interrupt or wake the device from a low
power mode when a transition occurs on a digital I/O pin. The digital event capture functions do not require
dedicated pins and will function on both GPIO pins (PnSKIP = 1) and pins in use by the Crossbar (PnSKIP
= 0). External digital even capture functions cannot be used on pins configured for analog I/O. Table 21.3
shows all available external digital event capture functions.
208
Digital Function
UART0, SPI1, SPI0, SMBus,
CP0 and CP1 Outputs, Sys-
tem Clock Output, PCA0,
Timer0 and Timer1 External
Inputs.
Any pin used for GPIO
Digital Function
External Interrupt 0
External Interrupt 1
Port Match
Analog Function
Voltage Reference (VREF0)
Analog Ground Reference (AGND)
Current Reference (IREF0)
External Oscillator Input (XTAL1)
External Oscillator Output (XTAL2)
Table 21.3. Port I/O Assignment for External Digital Event Capture Functions
Table 21.1. Port I/O Assignment for Analog Functions
Table 21.2. Port I/O Assignment for Digital Functions
Note: The Crossbar will always assign UART0
Crossbar. This includes P0.0–P1.6 pins which
Any Port pin available for assignment by the
Potentially Assignable Port Pins
Potentially Assignable Port Pins
and SPI1 pins to fixed locations.
have their PnSKIP bit set to 0.
P0.0–P1.6, P2.7
Rev. 1.0
P0.0–P0.7
P0.0–P0.7
P0.0–P1.6
Assignable Port Pins
Potentially
P0.0
P0.1
P0.7
P0.2
P0.3
IREF0CN, PnSKIP
OSCXCN, PnSKIP
OSCXCN, PnSKIP
REF0CN, PnSKIP
REF0CN, PnSKIP
SFR(s) used for
Assignment
XBR0, XBR1, XBR2
P0MASK, P0MAT
P1MASK, P1MAT
SFR(s) used for
P0SKIP, P1SKIP
SFR(s) used for
Assignment
Assignment
IT01CF
IT01CF