C8051F411-GMR Silicon Laboratories Inc, C8051F411-GMR Datasheet - Page 119
C8051F411-GMR
Manufacturer Part Number
C8051F411-GMR
Description
Microcontrollers (MCU) 50 MIPS 32KB 12ADC RTCLOCK 28 PIN MCU
Manufacturer
Silicon Laboratories Inc
Datasheet
1.C8051F410DK.pdf
(270 pages)
Specifications of C8051F411-GMR
Processor Series
C8051F4x
Core
8051
Data Bus Width
8 bit
Program Memory Type
Flash
Program Memory Size
32 KB
Data Ram Size
2.25 KB
Interface Type
I2C, SMBus, SPI, UART
Maximum Clock Frequency
50 MHz
Number Of Programmable I/os
20
Number Of Timers
4
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
QFN
3rd Party Development Tools
PK51, CA51, A51, ULINK2
Development Tools By Supplier
C8051F410DK
Minimum Operating Temperature
- 40 C
On-chip Adc
12 bit, 20 Channel
On-chip Dac
12 bit, 2 Channel
Package
28QFN EP
Device Core
8051
Family Name
C8051F41x
Maximum Speed
50 MHz
Ram Size
2.25 KB
Operating Supply Voltage
1.8|2.5|3.3|5 V
Operating Temperature
-40 to 85 °C
Lead Free Status / Rohs Status
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
C8051F411-GMR
Manufacturer:
SiliconL
Quantity:
3 000
Part Number:
C8051F411-GMR
Manufacturer:
SILICON LABS/芯科
Quantity:
20 000
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13. Prefetch Engine
The C8051F41x family of devices incorporate a 2-byte prefetch engine. Due to Flash access time specifi-
cations, the prefetch engine is necessary for full-speed (50 MHz) code execution. Instructions are read
from Flash memory two bytes at a time by the prefetch engine, and given to the CIP-51 processor core to
execute. When running linear code (code without any jumps or branches), the prefetch engine allows
instructions to be executed at full speed. When a code branch occurs, the processor may be stalled for up
to two clock cycles while the next set of code bytes is retrieved from Flash memory. The FLRT bit
(FLSCL.4) determines how many clock cycles are used to read each set of two code bytes from Flash.
When operating from a system clock of 25 MHz or less, the FLRT bit should be set to ‘0’ so that the
prefetch engine takes only one clock cycle for each read. When operating with a system clock of greater
than 25 MHz (up to 50 MHz), the FLRT bit should be set to ‘1’, so that each prefetch code read lasts for
two clock cycles.
Bits 7–6: Unused. Read = 00b; Write = Don’t Care
Bit 5:
Bits 4–1: Unused. Read = 0000b; Write = Don’t Care
Bit 0:
Note: The prefetch engine should be disabled when changes to FLRT are made. See
Bit7
R
PFEN: Prefetch Enable.
This bit enables the prefetch engine.
0: Prefetch engine is disabled.
1: Prefetch engine is enabled.
FLBWE: Flash Block Write Enable.
This bit allows block writes to Flash memory from software.
0: Each byte of a software Flash write is written individually.
1: Flash bytes are written in groups of two.
“16. Flash Memory” on page 135
Bit6
SFR Definition 13.1. PFE0CN: Prefetch Engine Control
R
PFEN
R/W
Bit5
Bit4
R
.
Rev. 1.1
Bit3
R
Bit2
R
C8051F410/1/2/3
Bit1
R
SFR Address: 0xE3
FLBWE
R/W
Bit0
Section
00100000
Reset Value
119
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