C8051F302 Silicon Laboratories Inc, C8051F302 Datasheet - Page 87

• Manufacturer Part Number: C8051F302
• Description: IC 8051 MCU 8K FLASH 11MLP
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F30xr

Specifications of C8051F302

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: SMBus (2-Wire/I²C), UART/USART
• Peripherals: POR, PWM, Temp Sensor, WDT
• Number Of I /o: 8
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 8x8b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 11-VQFN
• 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: 16 bit
• Operating Supply Voltage: 2.7 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8 bit
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: No

Bits7-0:
Bits7:
Bits6-0:
FOSE
R/W
R/W
Bit7
Bit7
FLKEY: FLASH Lock and Key Register
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. Read = 0. Must Write 0.
Reserved
R/W
R/W
Bit6
Bit6
Figure 10.3. FLKEY: FLASH Lock and Key Register
Reserved
Figure 10.4. FLSCL: FLASH Scale Register
R/W
R/W
Bit5
Bit5
Reserved
R/W
R/W
Bit4
Bit4
Reserved
R/W
R/W
Bit3
Bit3
Rev. 2.3
Reserved
R/W
R/W
Bit2
Bit2
C8051F300/1/2/3/4/5
Reserved
R/W
R/W
Bit1
Bit1
Reserved
R/W
R/W
Bit0
Bit0
SFR Address:
SFR Address:
00000000
10000000
Reset Value
Reset Value
0xB7
0xB6
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