C8051F350DK Silicon Laboratories Inc, C8051F350DK Datasheet - Page 137
![DEV KIT FOR F350/351/352/353](/photos/9/23/92327/c8051f350dk_sml.jpg)
C8051F350DK
Manufacturer Part Number
C8051F350DK
Description
DEV KIT FOR F350/351/352/353
Manufacturer
Silicon Laboratories Inc
Type
MCUr
Specifications of C8051F350DK
Contents
Evaluation Board, Power Supply, USB Cables, Adapter and Documentation
Processor To Be Evaluated
C8051F35x
Interface Type
USB
Silicon Manufacturer
Silicon Labs
Core Architecture
8051
Silicon Core Number
C8051F350
Silicon Family Name
C8051F35x
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With/related Products
C8051F350, 351, 352, 353
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1083
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
C8051F350DK
Manufacturer:
SiliconL
Quantity:
8
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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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