HD6432646 Hitachi, HD6432646 Datasheet - Page 716

no-image

HD6432646

Manufacturer Part Number
HD6432646
Description
(HD64F264x Series) 16-Bit Microcomputer
Manufacturer
Hitachi
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
HD6432646A52FCJ
Manufacturer:
RENESAS
Quantity:
1 000
Part Number:
HD6432646A52FCJ
Manufacturer:
HIT
Quantity:
1 000
Part Number:
HD6432646A52FCJ
Manufacturer:
RENESAS/瑞萨
Quantity:
20 000
Part Number:
HD6432646B37FCJ
Manufacturer:
RENESAS/瑞萨
Quantity:
20 000
Part Number:
HD6432646B67FCJ
Manufacturer:
RENESAS/瑞萨
Quantity:
20 000
Part Number:
HD6432646B82FCJ
Manufacturer:
RENESAS
Quantity:
1 000
Part Number:
HD6432646B99FCJ
Manufacturer:
MOT
Quantity:
44
Part Number:
HD6432646B99FCJ
Manufacturer:
RENESAS
Quantity:
3 967
Part Number:
HD6432646B99FCJ
Manufacturer:
RENESAS/瑞萨
Quantity:
20 000
Part Number:
HD6432646C41FCJ
Manufacturer:
RENESAS
Quantity:
1 954
Part Number:
HD6432646C41FCJ
Manufacturer:
RENESAS
Quantity:
1 700
Part Number:
HD6432646C41FCJ
Manufacturer:
RENESAS/瑞萨
Quantity:
20 000
Part Number:
HD6432646C64FCJ
Manufacturer:
RENESAS
Quantity:
1 500
Part Number:
HD6432646C90FCJV
Manufacturer:
RENESAS
Quantity:
3 967
Part Number:
HD6432646D08FCJV
Manufacturer:
RENESAS
Quantity:
1 700
20.7.1
Program Mode
When writing data or programs to flash memory, the program/program-verify flowchart shown in
figure 20-11 should be followed. Performing programming operations according to this flowchart
will enable data or programs to be written to flash memory without subjecting the device to
voltage stress or sacrificing program data reliability. Programming should be carried out 128 bytes
at a time.
The wait times after bits are set or cleared in the flash memory control register 1 (FLMCR1) and
the maximum number of programming operations (N) are shown in table 23-10 in section 23.7,
Flash Memory Characteristics.
Following the elapse of (t
) µs or more after the SWE bit is set to 1 in FLMCR1, 128-byte data
sswe
is written consecutively to the write addresses. The lower 8 bits of the first address written to must
be H'00 and H'80, 128 consecutive byte data transfers are performed. The program address and
program data are latched in the flash memory. 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.
Next, the watchdog timer (WDT) is set to prevent overprogramming due to program runaway, etc.
Set a value greater than (t
+ t
+ t
+ t
) µs as the WDT overflow period. Preparation for
spsu
sp
cp
cpsu
entering program mode (program setup) is performed next by setting the PSU bit in FLMCR1.
The operating mode is then switched to program mode by setting the P bit in FLMCR1 after the
elapse of at least (t
) µs. The time during which the P bit is set is the flash memory
spsu
programming time. Make a program setting so that the time for one programming operation is
within the range of (t
) µs.
sp
The wait time after P bit setting must be changed according to the degree of progress through the
programming operation. For details see “Notes on Program/Program-Verify Procedure.”
682

Related parts for HD6432646