C8051T630DK Silicon Laboratories Inc, C8051T630DK Datasheet - Page 90
![KIT DEV FOR C8051T630 FAMILY](/photos/9/23/92351/c8051t630dk_sml.jpg)
C8051T630DK
Manufacturer Part Number
C8051T630DK
Description
KIT DEV FOR C8051T630 FAMILY
Manufacturer
Silicon Laboratories Inc
Type
MCUr
Specifications of C8051T630DK
Contents
Board, daughter boards, power adapter, cables, documentation and software
Processor To Be Evaluated
C8051T63x
Interface Type
USB
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
C8051T630, T631, T632, T633, T634 and T635 MCUs
For Use With
336-1465 - BOARD SOCKET DAUGHTER 20-QFN
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1464
- Current page: 90 of 220
- Download datasheet (2Mb)
C8051T630/1/2/3/4/5
16.1.2. EPROM Read Procedure
1. Reset the device using the /RST pin.
2. Wait at least 20 µs before sending the first C2 command.
3. Place the device in core reset: Write 0x04 to the DEVCTL register.
4. Write 0x00 to the EPCTL register.
5. Write the first EPROM address for reading to EPADDRH and EPADDRL.
6. Read a data byte from EPDAT. EPADDRH:L will increment by 1 after this read.
7. (Optional) Check the ERROR bit in register EPSTAT and abort the memory read operation if necessary.
8. If reading is not finished, return to Step 6 to read the next address in sequence, or return to Step 5 to
9. Remove read mode (1st step): Write 0x40 to the EPCTL register.
10.Remove read mode (2nd step): Write 0x00 to the EPCTL register.
11. Reset the device: Write 0x02 and then 0x00 to the DEVCTL register.
16.2. Security Options
The C8051T630/1/2/3/4/5 devices provide security options to prevent unauthorized viewing of proprietary
program code and constants. A security byte in EPROM address space can be used to lock the program
memory from being read or written across the C2 interface. When read, the RDLOCK and WRLOCK bits in
register EPSTAT will indicate the lock status of the location currently addressed by EPADDR. Table 16.1
shows the security byte decoding. See Section “13. Memory Organization” on page 72 for the security byte
location and EPROM memory map.
Important Note: Once the security byte has been written, there are no means of unlocking the
device. Locking memory from write access should be performed only after all other code has been
successfully programmed to memory.
90
select a new address.
Bits
7–4
3–0
Description
Write Lock: Clearing any of these bits to logic 0 prevents all code
memory from being written across the C2 interface.
Read Lock: Clearing any of these bits to logic 0 prevents all code
memory from being read across the C2 interface.
Table 16.1. Security Byte Decoding
Rev. 1.0
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