UPD78F0890GK(A)-GAJ-AX NEC, UPD78F0890GK(A)-GAJ-AX Datasheet - Page 87

• 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

4.4.3 Subroutine call between memory banks
memory bank at the calling destination by using the BANK register there, execute the CALL instruction, and branch to
the call destination by that instruction.
executing the RET instruction.
Subroutines cannot be directly called between memory banks.
To call a subroutine between memory banks, branch once to the common area (0000H to 7FFFH), specify the
At this time, save the current value of the BANK register to RAM. Restore the value of the BANK register before
Common
area
Bank
area
Common
area
Bank
area
RET instruction
CHAPTER 4 MEMORY BANK SELECT FUNCTION (
ruction
CALL
inst-
Memory bank m
Memory bank m
User’s Manual U17554EJ4V0UD
Change BANK and save
memory bank number at
calling source.
BR instruction
CALL instruction
instruction
CALL
PD78F0889, 78F0890 ONLY)
RET instruction
Memory bank n
Memory bank n
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