C8051F526-IMR Silicon Labs, C8051F526-IMR Datasheet - Page 119

• Manufacturer Part Number: C8051F526-IMR
• Description: 8-bit Microcontrollers - MCU 2KB 12ADC 125C LIN 10Pin MCU
• Manufacturer: Silicon Labs

Specifications of C8051F526-IMR

• Product Category: 8-bit Microcontrollers - MCU
• Rohs: yes
• Core: 8051
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 25 MHz
• Program Memory Size: 2 KB
• Data Ram Size: 256 B
• On-chip Adc: Yes
• Package / Case: DFN-10
• Mounting Style: SMD/SMT
• A/d Bit Size: 12 bit
• A/d Channels Available: 6
• Interface Type: SPI, UART
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Number Of Programmable I/os: 6
• Number Of Timers: 3
• On-chip Dac: No
• Processor Series: C8051
• Program Memory Type: Flash
• Factory Pack Quantity: 1500
• Supply Voltage - Max: 2.7 V, 5.25 V
• Supply Voltage - Min: 2 V, 2.7 V

SFR Definition 12.1. PSCTL: Program Store R/W Control
SFR Definition 12.2. FLKEY: Flash Lock and Key
Bits7–2: UNUSED: Read = 000000b, Write = don’t care.
Bit1:
Bit0:
Note : See Section “12.1. Programming The Flash Memory” on page 113 for minimum V
Bits7–0: FLKEY: Flash Lock and Key Register
R/W
Bit7
Bit7
—
R
PSEE: Program Store Erase Enable
Setting this bit (in combination with PSWE) allows an entire page of Flash program memory
to be erased. If this bit is logic 1 and Flash writes are enabled (PSWE is logic 1), a write to
Flash memory using the MOVX instruction will erase the entire page that contains the loca-
tion addressed by the MOVX instruction. The value of the data byte written does not matter.
0: Flash program memory erasure disabled.
1: Flash program memory erasure enabled.
PSWE: Program Store Write Enable
Setting this bit allows writing a byte of data to the Flash program memory using the MOVX
write instruction. The Flash location should be erased before writing data.
0: Writes to Flash program memory disabled.
1: Writes to Flash program memory enabled; the MOVX write instruction targets Flash
memory.
requirements for flash erase and write operations.
Write:
This register provides a lock and key function for Flash erasures and writes. Flash writes
and erases are enabled by writing 0xA5 followed by 0xF1 to the FLKEY register. Flash
writes and erases are automatically disabled after the next write or erase is complete. If any
writes to FLKEY are performed incorrectly, or if a Flash write or erase operation is attempted
while these operations are disabled, the Flash will be permanently locked from writes or era-
sures until the next device reset. If an application never writes to Flash, it can intentionally
lock the Flash by writing a non-0xA5 value to FLKEY from software.
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.
R/W
Bit6
Bit6
—
R
R/W
Bit5
Bit5
—
R
R/W
Bit4
Bit4
—
R
Rev. 1.4
R/W
Bit3
Bit3
—
R
R/W
Bit2
Bit2
—
R
C8051F52x/F53x
PSEE
R/W
R/W
Bit1
Bit1
DD
SFR Address:
SFR Address:
and temperature
PSWE
R/W
Bit0
R/W
Bit0
00000000
Reset Value
00000000
Reset Value
0x8F
0xB7
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