c8051t623-g Silicon Laboratories, c8051t623-g Datasheet - Page 68
c8051t623-g
Manufacturer Part Number
c8051t623-g
Description
Full Speed Usb Eprom Mcu Family
Manufacturer
Silicon Laboratories
Datasheet
1.C8051T623-G.pdf
(247 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
c8051t623-gM
Manufacturer:
Silicon
Quantity:
68
- Current page: 68 of 247
- Download datasheet (2Mb)
SFR Definition 13.1. PSCTL: Program Store R/W Control
SFR Address = 0x8F
SFR Definition 13.2. MEMKEY: EPROM Memory Lock and Key
SFR Address = 0xB7
Name
Reset
Name
Reset
Bit
7:1
Bit
7:0 MEMKEY[7:0] EPROM Lock and Key Register.
Type
Type
0
Bit
Bit
Unused
PSWE
Name
Name
R
7
0
7
0
Unused. Read = 0000000b. Write = don’t care.
Program Store Write Enable.
Setting this bit allows writing a byte of data to the EPROM program memory using the
MOVX write instruction.
0: Writes to EPROM program memory disabled.
1: Writes to EPROM program memory enabled; the MOVX write instruction targets
EPROM memory.
Write:
This register provides a lock and key function for EPROM writes. EPROM writes are
enabled by writing 0xA5 followed by 0xF1 to the MEMKEY register. EPROM writes
are automatically disabled after the next write is complete. If any writes to MEMKEY
are performed incorrectly, or if a EPROM write operation is attempted while these
operations are disabled, the EPROM will be permanently locked from writes until the
next device reset. If an application never writes to EPROM, it can intentionally lock
the EPROM by writing a non-0xA5 value to MEMKEY from software.
Read:
When read, bits 1–0 indicate the current EPROM lock state.
00: EPROM is write locked.
01: The first key code has been written (0xA5).
10: EPROM is unlocked (writes allowed).
11: EPROM writes disabled until the next reset.
R
6
0
6
0
R
5
0
5
0
C8051T622/3 and C8051T326/7
Rev. 1.1
MEMKEY[7:0]
R
4
0
4
0
R/W
Function
Function
R
3
0
3
0
R
2
0
2
0
R
1
0
1
0
PSWE
R/W
0
0
0
0
75
Related parts for c8051t623-g
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
SMD/C°/SINGLE-ENDED OUTPUT SILICON OSCILLATOR
Manufacturer:
Silicon Laboratories Inc
Part Number:
Description:
Manufacturer:
Silicon Laboratories Inc
Datasheet:
Part Number:
Description:
N/A N/A/SI4010 AES KEYFOB DEMO WITH LCD RX
Manufacturer:
Silicon Laboratories Inc
Datasheet:
Part Number:
Description:
N/A N/A/SI4010 SIMPLIFIED KEY FOB DEMO WITH LED RX
Manufacturer:
Silicon Laboratories Inc
Datasheet:
Part Number:
Description:
N/A/-40 TO 85 OC/EZLINK MODULE; F930/4432 HIGH BAND (REV E/B1)
Manufacturer:
Silicon Laboratories Inc
Part Number:
Description:
EZLink Module; F930/4432 Low Band (rev e/B1)
Manufacturer:
Silicon Laboratories Inc
Part Number:
Description:
I°/4460 10 DBM RADIO TEST CARD 434 MHZ
Manufacturer:
Silicon Laboratories Inc
Part Number:
Description:
I°/4461 14 DBM RADIO TEST CARD 868 MHZ
Manufacturer:
Silicon Laboratories Inc
Part Number:
Description:
I°/4463 20 DBM RFSWITCH RADIO TEST CARD 460 MHZ
Manufacturer:
Silicon Laboratories Inc
Part Number:
Description:
I°/4463 20 DBM RADIO TEST CARD 868 MHZ
Manufacturer:
Silicon Laboratories Inc
Part Number:
Description:
I°/4463 27 DBM RADIO TEST CARD 868 MHZ
Manufacturer:
Silicon Laboratories Inc
Part Number:
Description:
I°/4463 SKYWORKS 30 DBM RADIO TEST CARD 915 MHZ
Manufacturer:
Silicon Laboratories Inc
Part Number:
Description:
N/A N/A/-40 TO 85 OC/4463 RFMD 30 DBM RADIO TEST CARD 915 MHZ
Manufacturer:
Silicon Laboratories Inc
Part Number:
Description:
I°/4463 20 DBM RADIO TEST CARD 169 MHZ
Manufacturer:
Silicon Laboratories Inc