Datasheet

Section 19 ROM
Rev.6.00 Sep. 27, 2007 Page 819 of 1268
REJ09B0220-0600
Start
End of programming
End sub
Set SWE bit in FLMCR1
Wait (x) μs
n = 1
m = 0
Sub-routine-call
See Note 7 for pulse width
Note 7: Write Pulse Width
Start of programming
Sub-routine write pulse
Set PSU bit in FLMCR1
Enable WDT
Set P bit in FLMCR1
Wait (y) μs
Clear P bit in FLMCR1
Wait (z1) μs or (z2) μs or (z3) μs
Clear PSU bit in FLMCR1
Wait (α) μs
Disable WDT
Wait (β) μs
Write pulse application subroutine
NG
NG
NG
NG
NG NG
OK
OK
OK
OK
OK
Wait (γ) μs
Wait (ε) μs
*2
*4
*6
*6
*6
*6
*6
*6
*6
*6 *6
*5 *6
*6
*6
*6
*6
*1
Set PV bit in FLMCR1
H'FF dummy write to verify address
Read verify data
Additional program data computation
Transfer additional program data to
additional program data area
Read data = verify
data?
*4
*1
*4
*3
Reprogram data computation
Clear PV bit in FLMCR1
Clear SWE bit in FLMCR1
m = 1
128-byte
data verification
completed?
m = 0?
6 ≥ n ?
6 ≥ n ?
Increment address
Programming failure
OK
Clear SWE bit in FLMCR1
n ≥ N?
Write 128-byte data in RAM reprogram
data area consecutively to flash memory
Write pulse
(z1) μs or (z2) μs
Perform programming in the erased state.
Do not perform additional programming
on previously programmed addresses.
RAM
Program data area
(128 bytes)
Reprogram data area
(128 bytes)
Additional program data
area (128 bytes)
Store 128-byte program data in program
data area and reprogram data area
Number of Writes (n)
1
2
3
4
5
6
7
8
9
10
11
12
13
.
.
.
998
999
1000
Write Time (z) μs
z1
z1
z1
z1
z1
z1
z2
z2
z2
z2
z2
z2
z2
.
.
.
z2
z2
z2
Notes: 1. Data transfer is performed by byte transfer. The lower 8 bits of the first
address written to must be H'00 or H'80. A 128-byte data transfer must
be performed even if writing fewer than 128 bytes; in this case, H'FF
data must be written to the extra addresses.
2. Verify data is read in 16-bit (W) units.
3. Even bits for which programming has been completed in the 128-byte
programming loop will be subjected to additional programming if they fail
the subsequent verify operation.
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
should be provided in RAM. The contents of the reprogram data and
additional program data areas are modified as programming proceeds.
0
1
0
1
0
1
1
0
1
Comments
Programming completed
Programming incomplete; reprogram
Still in erased state; no action
Program Data Operation Chart
Transfer reprogram data to reprogram
data area
n ← n + 1
Note: Use a (z3) µs write pulse for additional
programming.
Sequentially write 128-byte data in
additional program data area in RAM to
flash memory
Write Pulse
(z3) µs additional write pulse
Wait (θ) μs
Wait (η) μs
Wait (θ) μs
5. A write pulse of (z1) or (z2) μs should be applied according to the progress
of programming. See Note 7 for the pulse widths. When the additional program
data is programmed, a write pulse of (z3) μs should be applied. Reprogram data X' stands for reprogram data to which a write pulse has been applied.
6. For the values of x, y, z1, z2, z3, α, β, γ, ε, η, θ, and N, see section 22.2.6, Flash Memory Characteristics.
Original Data
(D)
Verify Data
(V)
Reprogram Data
(X)
0
1
0
1
0
1
0
1
Comments
Additional programming executed
Additional programming not executed
Additional programming not executed
Additional programming not executed
Additional Program Data Operation Chart
Reprogram
Data (X')
Verify Data
(V)
Additional
Program Data (Y)
Figure 19.41 Program/Program-Verify Flowchart