UPD78F9222MC(T)-5A4-A NEC, UPD78F9222MC(T)-5A4-A Datasheet - Page 283

• Manufacturer Part Number: UPD78F9222MC(T)-5A4-A
• Description: 8BIT MCU, 4K FLASH, 256B RAM, 78F9222
• Manufacturer: NEC

Specifications of UPD78F9222MC(T)-5A4-A

• Controller Family/series: UPD78
• No. Of I/o's: 17
• Ram Memory Size: 256Byte
• Cpu Speed: 10MHz
• No. Of Timers: 4
• No. Of: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 4KB
• Oscillator Type: External, Internal

(5) Flash address pointers H and L (FLAPH and FLAPL)
These registers are used to specify the start address of the flash memory when the memory is erased, written,
or verified in the self programming mode.
FLAPH and FLAPL consist of counters, and they are incremented until the values match with those of
FLAPHC and FLAPLC when the programming command is not executed. When the programming command
is executed, therefore, set the value again.
These registers are set with a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation makes these registers undefined.
Note If any command other than those above is executed, command execution may immediately be
Address: FFA3H
FLCMD
Symbol
terminated, and bits 1 and 2 (WEPRERR and VCERR) of the flash status register (PFS) may be set
to 1.
Figure 18-13. Format of Flash Programming Command Register (FLCMD)
FLCMD2
7
0
0
0
0
1
1
Other than above
After reset: 00H
FLCMD1
6
0
0
1
1
0
0
CHAPTER 18 FLASH MEMORY
FLCMD0
Note
User’s Manual U16898EJ5V0UD
5
0
1
0
1
0
1
R/W
Setting prohibited
Internal verify 1
Internal verify 2
Block erase
Block blank check
Byte write
Command Name
4
0
3
0
This command is used to check if
data has been correctly written to the
flash memory. It is used to check
whether data has been written to an
entire block. If an error occurs, bit 1
(VCERR) or bit 2 (WEPRERR) of the
flash status register (PFS) is set to 1.
This command is used to check if
data has been correctly written to the
flash memory. It is used to check
whether data has been written to
multiple addresses in the same
block. If an error occurs, bit 1
(VCERR) or bit 2 (WEPRERR) of the
flash status register (PFS) is set to 1.
This command is used to erase
specified block. It is used both in the
on-board mode and self
programming mode.
This command is used to check if the
specified block has been erased.
This command is used to write 1-byte
data to the specified address in the
flash memory. Specify the write
address and write data, then execute
this command.
If 1 is written to a bit that has not
been erased (a bit for which the data
is 0), then bit 2 (WEPRERR) of the
flash status register (PFS) becomes
1.
FLCMD2
2
Function
FLCMD1
1
FLCMD0
0
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