SH7052 datasheet(738/919 Pages) RENESAS

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Return

Start of subroutine

Set PSU1 bit in FLMCR1

Enable WDT

Set P1 bit in FLMCR1

Wait: tSPSU

Clear P1 bit in FLMCR1

Wait: tSP10, tSP30, or tSP200

Clear PSU1 bit in FLMCR1

Wait: tCP

Disable WDT

Wait: tCPSU

Subroutine: Write Pulse

Reprogram Data

(X')

Verify Data

(V)

Additional-Programming

Data (Y)

Comments

Additional programming executed

Additional programming not executed

RAM

Program data storage area

(128 bytes)

Reprogram data storage area

(128 bytes)

Additional program data

storage area (128 byte)

Number of Writes n

998

999

1000

Write Time (z)

µsec

tSP30

tSP200

Original Data

(D)

Verify Data

(V)

Reprogram Data

(X)

Comments

Programming complete.

Programming is incomplete; reprogramming should be performed.

Reprogram Data Computation Table

—

Left in the erased state.

Additional-Programming Data Computation Table

Note: Use a tSP10 write pulse for additional programming.

Notes: 1. Transfer data in byte units. The lower eight bits of the start

address to which data is written must be H'00 or H'80.

Transfer 128-byte data even when writing fewer than 128 bytes.

In this case, Set H'FF in unused addresses.

2. Read verify data in longword form (32 bits).

3. Even for bits to which data has already been written in the 128-

byte programming loop, an additional write should be performed

if the next verify write data is not the same as the verify data.

4. A 128-byte area for storing program data, a 128-byte area for

storing reprogram data, and a 128-byte area for storing additional

program data must be provided in RAM. The reprogram and

additional program data contents are modified as programming

proceeds.

5. A write pulse of tSP30 or tSP200 is applied according to the

progress of the programming operation. See Note 6 for the pulse

widths. When writing of the additional program data is executed,

a tSP10 write pulse should be applied. Reprogram data X' means

reprogram data when the pulse is applied.

6. Write Pulse Width

Figure 20.14 Program/Program-Verify Flowchart (2)

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