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STK18TA8
April 2005
Document Control #ML0028 rev 0.8
11
Table 1. SPI
TM INSTRUCTION SET
Instruction
Name
Code
Description
READ
0x03
Read SRAM data from selected address.
WRITE
0x02
Write SRAM data from selected address.
FREAD
0x0B
Fast read of SRAM data from selected address. (First byte is the delay byte).
CTLSEQ
0x0F
Device control command sequence.
Table 2. CONTROL COMMAND SEQUENCES
Command
Name
CMD Bytes
Description
STORE
0x4E38
0xB1C7
0x83E0
0x7C1F
0x703F
0x8FC0
Commands Device to transfer the SRAM data to the nonvolatile memory elements.
RECALL
0x4E38
0xB1C7
0x83E0
0x7C1F
0x703F
0x4C63
Commands Device to transfer the nonvolatile memory contents to the SRAM memory.
AUTOENA
0x4E38
0xB1C7
0x83E0
0x7C1F
0x703F
0x4B46
Turns on the AUTOSTORE
TM feature of the device, enabling automatic stores to nonvolatile memory
when VCC drops below VSWITCH.
AUTODIS
0x4E38
0xB1C7
0x83E0
0x7C1F
0x703F
0x8B45
Turns off the AUTOSTORE
TM feature of the device, disabling the automatic stores to nonvolatile
memory. STORES invoked by the control command STORE sequence and stores invoked by driving
the HSB pin remain enabled.