TOOLSTICK560DC Silicon Laboratories Inc, TOOLSTICK560DC Datasheet - Page 130

• Manufacturer Part Number: TOOLSTICK560DC
• Description: DAUGHTER CARD TOOLSTICK F560
• Manufacturer: Silicon Laboratories Inc
• Series: ToolStickr
• Type: MCUr

Specifications of TOOLSTICK560DC

• Contents: Daughter Card
• Processor To Be Evaluated: C8051F55x, C8051F56x, C8051F57x
• Interface Type: USB
• Operating Supply Voltage: 2.7 V to 3.6 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: C8051F55x, C8051F56x, C8051F57x
• For Use With: 336-1345 - TOOLSTICK BASE ADAPTER336-1182 - ADAPTER USB DEBUG FOR C8051FXXX
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1719

C8051F55x/56x/57x
SFR Definition 14.2. FLKEY: Flash Lock and Key
SFR Address = 0xB7; SFR Page = All Pages
130
Name
Reset
7:0 FLKEY[7:0] Flash Lock and Key Register.
Bit
Type
Bit
Name
7
0
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 regis-
ter. 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 perma-
nently locked from writes or erasures 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.
6
0
5
0
Rev. 1.1
4
0
FLKEY[7:0]
R/W
Function
3
0
2
0
1
0
0
0