adsp-21535 STMicroelectronics, adsp-21535 Datasheet - Page 15

• Manufacturer Part Number: adsp-21535
• Description: Dsm Digital Signal Processor System Memory For Analog Devices Dsps 3.3v Supply
• Manufacturer: STMicroelectronics

Table 5. Instruction Sequences for 8-bit Operation (Notes 1,2,3,4)
Note: 1. All values are in hexadecimal, X = “Don’t care”
Read Memory
Contents
Read Flash
Identifier (Main
Flash only)
Read Memory
Sector Protection
Status
Program a Flash
Byte
Flash Bulk Erase
Flash Sector
Erase
Suspend Sector
Erase
Resume Sector
Erase
Reset Flash
Unlock Bypass
Unlock Bypass
Program
Unlock Bypass
Reset
Instruction
Sequence
2. A desired internal Flash memory sector select signal (FS0 - FS7 or CSBOOT0 - CSBOOT3) must be active for each WRITE or
3. Only address Bits A11-A0 are used during Flash memory instruction sequence decoding bus cycles. The individual sector select
4. For WRITE operations, addresses are latched on the falling edge of Write Strobe (WR, CNTL0), Data is latched on the rising edge
5. No Unlock or Instruction cycles are required when the device is in the Read Array Mode. Operation is like reading a ROM device.
10
11
12
14
6,7,8
READ cycle. Only one of these sector select signals will be active at any given time depending on the address presented by the
DSP and the memory mapping defined in PSDsoft Express. FS0 - FS7 and CSBOOT0-CSBOOT3 are active high logic internally.
signal (FS0 - FS7 or CSBOOT0-CSBOOT3) which is active during the instruction sequences determines the complete address.
of Write Strobe (WR, CNTL0)
13
5
6,7
6
9
Read byte
from any
valid Flash
memory addr
Write AAh to
XX555h
Write AAh to
XX555h
Write AAh to
XX555h
Write AAh to
XX555h
Write AAh to
XX555h
Write B0h to
addr in FS0-7
or
CSBOOT0-3
Write 30h to
addr in FS0-7
or
CSBOOT0-3
Write F0h to
addr in FS0-7
or
CSBOOT0-3
Write AAh to
XX555h
Write A0h to
addr in FS0-7
or
CSBOOT0-3
Write 90h to
addr in FS0-7
or
CSBOOT0-3
Cycle 1
Write 55h
to XXAAAh
Write 55h
to XXAAAh
Write 55h
to XXAAAh
Write 55h
to XXAAAh
Write 55h
to XXAAAh
Write 55h
to XXAAAh
Write
(program)
data to
addr
Write 00h
to addr in
FS0-7 or
CSBOOT0-
3
Cycle 2
Write 90h
to XX555h
Write 90h
to XX555h
Write A0h
to XX555h
Write 80h
to XX555h
Write 80h
to XX555h
Write 20h
to XX555h
Cycle 3
Read identifier
at addr
XXX01h
Read value at
addr XXX02h
Write
(program) data
to addr
Write AAh to
XX555h
Write AAh to
XX555h
Cycle 4
Write 55h
to XXAAAh
Write 55h
to XXAAAh
Cycle 5
Write 10h
to XX555h
Write 30h
to another
Sector
Cycle 6
DSM2150F5V
Write 30h
to another
Sector
Cycle 7
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