UPD78F0890GK(A)-GAJ-AX NEC, UPD78F0890GK(A)-GAJ-AX Datasheet - Page 625

• Manufacturer Part Number: UPD78F0890GK(A)-GAJ-AX
• Description: 8BIT MCU, 128K FLASH, 7K RAM, LQFP
• Manufacturer: NEC

Specifications of UPD78F0890GK(A)-GAJ-AX

• Controller Family/series: UPD78F
• No. Of I/o's: 55
• Ram Memory Size: 7KB
• Cpu Speed: 20MHz
• No. Of Timers: 10
• No. Of Pwm: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 128KB
• Oscillator Type: External, Internal

Address: FFC4H
FLPMC
Symbol
Figure 24-17. Format of Flash-Programming Mode Control Register (FLPMC)
Notes 1.
Cautions 1. Be sure to keep FWEDIS at 0 until writing or erasing of the flash memory is
FLSPM1
FWEDIS
FWEPR
2.
3.
4.
0
1
0
1
0
0
1
1
2. Make sure that FWEDIS = 1 in the normal mode.
3. Manipulate FLSPM1 and FLSPM0 after execution branches to the internal
0
Differs depending on the operation mode.
• User mode:
• On-board mode:
Bit 2 (FWEPR) is read-only.
For actual writing/erasing, the FLMD0 pin must be high (FWEPR = 1), as well as
FWEDIS = 0.
The user ROM (flash memory) or firmware ROM can be selected by FLSPM1 and
FLSPM0, and the operation mode set on the application system by the mode pin or
the self-programming mode can be selected.
Note 4
FWEDIS FWEPR
Other than above
completed.
RAM. The address of the flash memory is specified by an address signal
from the CPU when FLSPM1 = 0 or the set value of the firmware written when
FLSPM1 = 1.
FLSPM0 are ignored.
After reset: 0 H
FLSPM0
0
Writing/erasing enabled
Writing/erasing disabled
Low level
High level
0
1
1
0
0
Note 4
CHAPTER 24 FLASH MEMORY
Note 3
1
Normal mode
Self-programming mode
Setting prohibited
User’s Manual U17554EJ4V0UD
Access (fetch of a command, lead of data) is possible to
all the address domains of a flash memory.
Execution"CALL #8100 H" of firmware is possible.
Access (lead of an instruction fetch and data) is possible
to a flash memory .
0
Note 1
Selection of operation mode during self-programming
In the on-board mode, the specifications of FLSPM1 and
Control of flash memory writing/erasing
Writing/erasing enabled
Writing/erasing disabled
08H
0CH
Note 3
Enable or disable of flash memory writing/erasing
R/W
0
Status of FLMD0 pin
Note 2
FWEDIS
FWEPR
FLSPM1 FLSPM0
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