C8051F351-GMR Silicon Laboratories Inc, C8051F351-GMR Datasheet - Page 137
![IC 8051 MCU 8K FLASH 28MLP](/photos/6/93/69391/sl-28-mlp_sml.jpg)
C8051F351-GMR
Manufacturer Part Number
C8051F351-GMR
Description
IC 8051 MCU 8K FLASH 28MLP
Manufacturer
Silicon Laboratories Inc
Series
C8051F35xr
Specifications of C8051F351-GMR
Core Processor
8051
Core Size
8-Bit
Speed
50MHz
Connectivity
SMBus (2-Wire/I²C), SPI, UART/USART
Peripherals
POR, PWM, Temp Sensor, WDT
Number Of I /o
17
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
Ram Size
768 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.6 V
Data Converters
A/D 8x24b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
28-VQFN Exposed Pad, 28-HVQFN, 28-SQFN, 28-DHVQFN
Processor Series
C8051F3x
Core
8051
Data Bus Width
8 bit
Data Ram Size
768 B
Interface Type
I2C, SMBus, SPI, UART
Maximum Clock Frequency
50 MHz
Number Of Programmable I/os
17
Number Of Timers
4
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
KSK-SL-TOOLSTICK, PK51, CA51, A51, ULINK2
Development Tools By Supplier
C8051F350DK
Minimum Operating Temperature
- 40 C
On-chip Adc
24 bit, 8 Channel
On-chip Dac
8 bit, 2 Channel
For Use With
336-1083 - DEV KIT FOR F350/351/352/353
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Details
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18. Port Input/Output
Digital and analog resources are available through 17 I/O pins. Port pins are organized as two byte-wide
Ports and one 1-bit Port. Each of the Port pins can be defined as general-purpose I/O (GPIO) or analog
input/output; Port pins P0.0 - P1.7 can be assigned to one of the internal digital resources as shown in
Figure 18.3. The designer has complete control over which functions are assigned, limited only by the
number of physical I/O pins. This resource assignment flexibility is achieved through the use of a Priority
Crossbar Decoder. Note that the state of a Port I/O pin can always be read in the corresponding Port latch,
regardless of the Crossbar settings.
The Crossbar assigns the selected internal digital resources to the I/O pins based on the Priority Decoder
(Figure 18.3 and Figure 18.4). The registers XBR0 and XBR1, defined in SFR Definition 18.1 and SFR
Definition 18.2, are used to select internal digital functions.
All Port I/Os are 5 V tolerant (refer to Figure 18.2 for the Port cell circuit). The Port I/O cells are configured
as either push-pull or open-drain in the Port Output Mode registers (PnMDOUT, where n = 0,1,2). Com-
plete Electrical Specifications for Port I/O are given in Table 18.1 on page 150.
Highest
Priority
Lowest
Priority
SYSCLK
Outputs
SMBus
T0, T1
UART
P0
P1
P2
PCA
CP0
SPI
(P0.0-P0.7)
(P1.0-P1.7)
Figure 18.1. Port I/O Functional Block Diagram
2
2
4
2
4
2
8
8
(P2.0)
Rev. 1.1
PnSKIP Registers
XBR0, XBR1,
Crossbar
Decoder
Priority
Digital
8
8
PnMDIN Registers
PnMDOUT,
C8051F350/1/2/3
Cells
Cells
Cell
I/O
I/O
I/O
P0
P1
P2
P0.0
P0.7
P1.0
P1.7
P2.0
137
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