C8051F305-GS Silicon Laboratories Inc, C8051F305-GS Datasheet - Page 93
C8051F305-GS
Manufacturer Part Number
C8051F305-GS
Description
IC 8051 MCU 2K FLASH 14-SOIC
Manufacturer
Silicon Laboratories Inc
Series
C8051F30xr
Specifications of C8051F305-GS
Program Memory Type
FLASH
Program Memory Size
2KB (2K x 8)
Package / Case
14-SOIC (3.9mm Width), 14-SOL
Core Processor
8051
Core Size
8-Bit
Speed
25MHz
Connectivity
SMBus (2-Wire/I²C), UART/USART
Peripherals
POR, PWM, WDT
Number Of I /o
8
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.6 V
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Processor Series
C8051F3x
Core
8051
Data Bus Width
8 bit
Data Ram Size
256 B
Interface Type
I2C/SMBus/UART
Maximum Clock Frequency
25 MHz
Number Of Programmable I/os
8
Number Of Timers
3
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
PK51, CA51, A51, ULINK2
Development Tools By Supplier
C8051F300DK
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
770-1006 - ISP 4PORT FOR SILABS C8051F MCU336-1444 - ADAPTER PROGRAM TOOLSTICK F300
Eeprom Size
-
Data Converters
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1540-5
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Bits7–0: FLKEY: Flash Lock and Key Register
Bits7:
Bits6–0: RESERVED. Read = 0. Must Write 0.
FOSE
R/W
R/W
Bit7
Bit7
Write:
This register must be written to before Flash writes or erases can be performed. Flash
remains locked until this register is written to with the following key codes: 0xA5, 0xF1. The
timing of the writes does not matter, as long as the codes are written in order. The key codes
must be written for each Flash write or erase operation. Flash will be locked until the next
system reset if the wrong codes are written or if a Flash operation is attempted before the
codes have been written correctly.
Read:
When read, bits 1–0 indicate the current Flash lock state.
00: Flash is write/erase locked.
01: The first key code has been written (0xA5).
10: Flash is unlocked (writes/erases allowed).
11: Flash writes/erases disabled until the next reset.
FOSE: Flash One-shot Enable
This bit enables the 50 ns Flash read one-shot. When the Flash one-shot disabled, the
Flash sense amps are enabled for a full clock cycle during Flash reads.
0: Flash one-shot disabled.
1: Flash one-shot enabled.
Reserved Reserved Reserved Reserved Reserved Reserved Reserved 10000000
R/W
Bit6
R/W
Bit6
SFR Definition 10.2.
SFR Definition 10.3.
R/W
Bit5
R/W
Bit5
R/W
Bit4
R/W
Bit4
FLKEY: Flash Lock and Key
Rev. 2.9
R/W
Bit3
R/W
Bit3
FLSCL: Flash Scale
R/W
Bit2
R/W
Bit2
C8051F300/1/2/3/4/5
R/W
Bit1
R/W
Bit1
R/W
Bit0
R/W
Bit0
SFR Address:
Reset Value
SFR Address:
00000000
Reset Value
0xB6
0xB7
93
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