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Auto algorithms, 1 command operation, Running an auto algorithm. see – FUJITSU MB91460 SERIES FR60 User Manual

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Chapter 54 Flash Memory

7.Auto Algorithms

7. Auto Algorithms

Writes and erases to Flash memory are performed by launching the Flash memory's own Auto Algorithms.

7.1 Command Operation

Auto Algorithms are launched by writing one to six half words (16 bits) to the Flash memory in succession.
This is called a “command.” Writing an illegal address or data, or writing them in the incorrect order, will reset
the Flash memory to read mode.

• Auto Algorithm Execution Status

If an Auto Algorithm is started in CPU mode, it is possible to learn the operational state of the Auto

Algorithm via the internal ready signal (RDY). The level of the ready signal can be read from the “RDY” bit
of the FLASH Memory Control Status Register.

While the “RDY” bit is set to “0”, data read is the hardware sequence flag indicating Flash memory status

(see Hardware sequence flag in (3) and (4)).

Table 7-1 List of Commands in CPU mode

Command

Sequence

Bus

Write

Cycle

1st Bus

Write cycle

2nd Bus

Write cycle

3rd Bus

Write cycle

4th Bus

Read/write

cycle

5th Bus

Write cycle

6th Bus

Write cycle

Address

Data

Address

Data

Address

Data

Address

Data

Address

Data

Address

Data

Read/
reset

1

*XXXX

H

F0

H

---

---

---

---

---

---

---

---

---

---

Read/
Reset

4

*x557

H

AA

H

*yAAF

H

55

H

*x557

H

F0

H

RA

RD

---

---

---

---

Writing

4

*x557

H

AA

H

*yAAF

H

55

H

*x557

H

A0

H

PA

PD

---

---

---

---

Chip erase

6

*x557

H

AA

H

*yAAF

H

55

H

*x557

H

80

H

*x557

H

AA

H

*yAAF

H

55

H

*x557

H

10

H

Sector erase

6

*x557

H

AA

H

*yAAF

H

55

H

*x557

H

80

H

*x557

H

AA

H

*yAAF

H

55

H

SA

30

H

Sector erase suspend

Suspend erase during sector erase with input of Address= “*XXXX

H

”, data = “B0

H

Sector erase resume

Resume erase after Sector erase suspend, with input of Address= “*XXXX

H

”, data = “30

H

Continuous
mode

3

*x557

H

AA

H

*yAAF

H

55

H

*x557

H

20

H

---

---

---

---

---

---

Continuous
writing

2

*XXXX

H

A0

H

PA

PD

---

---

---

---

---

---

---

---

Continuous
mode
Reset

2

*XXXX

H

90

H

*XXXX

H

F0

H

or
00

H

---

---

---

---

---

---

---

---

Both word mode and half-word mode are the same for commands. Any data can be set in the non-specified bits.
RA: Read address
PA: Write address
SA: Sector address (Specify any address in the sector)
RD: Read data
PD: Write data
*: “0004”, “0005”, “0006”, “0007”, “0008”, “0009”, “000A”, “000B”, “000C”, “000D”, “000E”, “000F”, “0010”, “0011”, “0012”, “0013” or “0014”
x: Any odd hex digit: “1“, “3“, “5“, “7“, “9“, “B“, “D“ or “F“
y: Any even hex digit: “0“, “2“, “4“, “6“, “8“, “A“, “C“ or “E“