C8051F353 Silicon Laboratories Inc, C8051F353 Datasheet - Page 210
C8051F353
Manufacturer Part Number
C8051F353
Description
IC 8051 MCU 8K FLASH 28MLP
Manufacturer
Silicon Laboratories Inc
Series
C8051F35xr
Specifications of C8051F353
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 8x16b; D/A 2x8b
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
-
Available stocks
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Part Number
Manufacturer
Quantity
Price
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Part Number:
C8051F353-GM
Manufacturer:
SiliconL
Quantity:
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C8051F350/1/2/3
23.2.1. Edge-triggered Capture Mode
In this mode, a valid transition on the CEXn pin causes the PCA to capture the value of the PCA
counter/timer and load it into the corresponding module's 16-bit capture/compare register (PCA0CPLn and
PCA0CPHn). The CAPPn and CAPNn bits in the PCA0CPMn register are used to select the type of transi-
tion that triggers the capture: low-to-high transition (positive edge), high-to-low transition (negative edge),
or either transition (positive or negative edge). When a capture occurs, the Capture/Compare Flag (CCFn)
in PCA0CN is set to logic 1 and an interrupt request is generated if CCF interrupts are enabled. The CCFn
bit is not automatically cleared by hardware when the CPU vectors to the interrupt service routine, and
must be cleared by software. If both CAPPn and CAPNn bits are set to logic 1, then the state of the Port
pin associated with CEXn can be read directly to determine whether a rising-edge or falling-edge caused
the capture.
Note: The CEXn input signal must remain high or low for at least 2 system clock cycles to be recognized by
the hardware.
210
Port I/O
Crossbar
Figure 23.4. PCA Capture Mode Diagram
CEXn
W
P
M
1
6
n
x
PCA0CPMn
O
M
E
C
n
0
Rev. 0.4
C
A
P
P
n
C
A
P
N
n
0
1
M
A
T
n
x 0 0 x
T
O
G
n
W
M
P
n
E
C
C
F
n
0
1
C
F
C
R
PCA0CN
C
C
F
4
C
C
F
3
PCA
Timebase
C
C
F
2
C
C
F
1
PCA Interrupt
C
C
F
0
Capture
PCA0CPLn
PCA0L
PCA0CPHn
PCA0H
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