C8051F411EK Silicon Laboratories Inc, C8051F411EK Datasheet - Page 141

• Manufacturer Part Number: C8051F411EK
• Description: KIT EVAL FOR C8051F411
• Manufacturer: Silicon Laboratories Inc
• Type: MCUr

Specifications of C8051F411EK

• Contents: Evaluation Board, CD-ROM, USB Cable, Batteries and User Guide
• Processor To Be Evaluated: C8051F41x
• Interface Type: USB
• Silicon Manufacturer: Silicon Labs
• Core Architecture: 8051
• Silicon Core Number: C8051F411
• Silicon Family Name: C8051F41x
• Kit Contents: LCD Based Evaluation Board, USB Cable, Software CD And Quick-Start Guide
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: Silicon Laboratories C8051F41x
• For Use With: 336-1315 - KIT REF DESIGN VOICE RECORD F41X
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1317

Bits7–2: UNUSED: Read = 000000b, Write = don’t care.
Bit1:
Bit0:
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.
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.
SFR Definition 16.1. PSCTL: Program Store R/W Control
R/W
Bit6
Bit6
R
-
SFR Definition 16.2. FLKEY: Flash Lock and Key
R/W
Bit5
Bit5
R
-
R/W
Bit4
Bit4
R
-
Rev. 1.1
R/W
Bit3
Bit3
R
-
R/W
Bit2
Bit2
R
-
C8051F410/1/2/3
PSEE
R/W
R/W
Bit1
Bit1
SFR Address:
SFR Address:
PSWE
R/W
R/W
Bit0
Bit0
0x8F
0xB7
00000000
Reset Value
00000000
Reset Value
141