UPD78F9222MC(T)-5A4-A NEC, UPD78F9222MC(T)-5A4-A Datasheet - Page 288

• 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

288
Caution Be sure to perform the series of operations described above using the user program at an
Remark
address where data is not erased or written.
<1> to <7> in Figure 18-18 correspond to <1> to <7> in 18.8.4 (previous page).
<4>
<5>
Figure 18-18. Example of Shifting to Self Programming Mode
FLPMC = 0FEH (inverted set value)
Shift to self programming mode
<1> Disable interrupts (by setting
<6> Check execution result
FLPMC = 01H (set value)
FLPMC = 01H (set value)
MK0 and MK1 to FFH and
executing DI instruction)
<3> Clear PFS
<2> Clear
<7> Termination
HALT instruction
(FLCMD = 00H)
NOP instruction
PFCMD = A5H
(FPRERR flag)
CHAPTER 18 FLASH MEMORY
User’s Manual U16898EJ5V0UD
If the CPU clock is lower than 1 MHz,
set it to be 1 MHz or higher.
FLCMD
Normal
Abnormal
; When interrupt function is used
; Set value is invalid
; Set value is valid