UPD78F0890GK(A)-GAJ-AX NEC, UPD78F0890GK(A)-GAJ-AX Datasheet - Page 80

• 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

4.1 Memory Bank
memory space of 8000H to BFFFH.
80
The
The
The memory banks are selected by using a memory bank select register (BANK).
(a)
(b)
μ
μ
μ
μ
PD78F0889
PD78F0890
PD78F0889 has memory banks 0 to 3, and the
PD78F0889, 78F0890 implement a ROM capacity of 96 KB or 128 KB by selecting a memory bank from a
CHAPTER 4 MEMORY BANK SELECT FUNCTION
Figure 4-1. Internal ROM (Flash Memory) Configuration
Bank
area
Common
area
Bank
area
Common
area
B F F F H
7 F F F H
(
8 0 0 0 H
0 0 0 0 H
μ
B F F F H
7 F F F H
8 0 0 0 H
0 0 0 0 H
PD78F0889, 78F0890 ONLY)
User’s Manual U17554EJ4V0UD
(memory bank 0)
Flash memory
32768
Flash memory
16384
(memory bank 0)
μ
Flash memory
32768
Flash memory
16384
(Memory bank 1)
PD78F0890 have memory banks 0 to 5, as shown below.
(Memory bank 1)
(Memory bank 2)
(Memory bank 2)
(Memory bank 3)
8 bits
8 bits
(Memory bank 4)
(Memory bank 3)
(Memory bank 5)
8 bits
8 bits