C8051F961-A-GM Silicon Labs, C8051F961-A-GM Datasheet - Page 354

• Manufacturer Part Number: C8051F961-A-GM
• Description: 8-bit Microcontrollers - MCU 128KB, DC-DC, LCD AES, QFN40
• Manufacturer: Silicon Labs

Specifications of C8051F961-A-GM

• Rohs: yes
• Core: 8051
• Processor Series: C8051
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 25 MHz
• Program Memory Size: 128 KB
• Data Ram Size: 8448 B
• On-chip Adc: Yes
• Operating Supply Voltage: 2.5 V to 3.3 V
• Operating Temperature Range: - 40 C to + 85 C
• Package / Case: QFN-40
• Mounting Style: SMD/SMT
• Number Of Programmable I/os: 34
• Number Of Timers: 4

C8051F96x
27.2.2. 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 27.2 shows all available digital functions and the potential mapping of Port I/O to each digital
function.
27.2.3. 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 27.3
shows all available external digital event capture functions.
354
Digital Function
UART0, SPI0, SPI1, SMBus,
CP0 and CP1 Outputs, Sys-
tem Clock Output, PCA0,
Timer0 and Timer1 External
Inputs.
Any pin used for GPIO
External Memory Interface
Digital Function
External Interrupt 0
External Interrupt 1
Port Match
Table 27.3. Port I/O Assignment for External Digital Event Capture Functions
Table 27.2. Port I/O Assignment for Digital Functions
Note: The Crossbar will always assign UART0 and
Crossbar. This includes P0.0–P2.7 pins which
Any Port pin available for assignment by the
SPI1 pins to fixed locations.
Potentially Assignable Port Pins
Potentially Assignable Port Pins
have their PnSKIP bit set to 0.
P0.0–P0.5, P1.6, P1.7
P0.0–P0.4, P1.6, P1.7
Rev. 0.5
P0.0–P7.0
P3.6–P6.7
P0.0–P1.7
XBR0, XBR1, XBR2
P0MASK, P0MAT
P1MASK, P1MAT
P0SKIP, P1SKIP,
SFR(s) used for
SFR(s) used for
Assignment
Assignment
EMI0CF
P2SKIP
IT01CF
IT01CF