UPD78F0890GK(A)-GAJ-AX NEC, UPD78F0890GK(A)-GAJ-AX Datasheet - Page 41

• 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

3.1 Memory Space
Products in the 78K0/FE2 can each access a 64 KB memory space. Figures 3-1 to 3-4 show the memory map.
Caution Regardless of the internal memory capacity, the initial values of the internal memory size
switching register (IMS) and internal expansion RAM size switching register (IXS) of the
78K0/FE2 is fixed (IMS = CFH, IXS = 0CH). Therefore, set the value corresponding to each
product as indicated below.
Note The
μ
μ
μ
μ
PD78F0887
PD78F0888
PD78F0889
PD78F0890
Table 3-1. Set Values of Internal Memory Size Switching Register (IMS)
KB, respectively. However, the set value of IMS of these devices is the same
as those of the 48 KB product because banks are used. For how to set the
banks, see 4.3 Memory Bank Select Register (BANK).
μ
PD78F0889 and
and Internal Expansion RAM Size Switching Register (IXS)
Flash Memory Version
CHAPTER 3 CPU ARCHITECTURE
User’s Manual U17554EJ4V0UD
μ
PD78F0890 have internal ROMs of 96 KB and 128
CCH
CFH
CCH
CCH
Note
Note
IMS
08H
08H
04H
00H
IXS
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