UPD78F0890GK(A)-GAJ-AX NEC, UPD78F0890GK(A)-GAJ-AX Datasheet - Page 49

• 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

(2) CALLT instruction table area
(3) Option byte area
(4) CALLF instruction entry area
(5) On-chip debug security ID setting area
3.1.2 Bank area (
The
The banks are selected by a bank select register (BANK) (see 4.3 Memory Bank Select Register (BANK)).
(a)
The 64-byte area 0040H to 007FH can store the subroutine entry address of a 1-byte call instruction (CALLT).
The option byte area is assigned to the 1-byte area of 0080H. Refer to CHAPTER 23 OPTION BYTE for details.
The area 0800H to 0FFFH can perform a direct subroutine call with a 2-byte call instruction (CALLF).
A 10-byte area of 0085H to 008EH and 1085H to 108EH can be used as an on-chip debug security ID setting
area. Set the on-chip debug security ID of 10 bytes at 0085H to 008EH when the boot swap is not used and at
0085H to 008EH and 1085H to 108EH when the boot swap is used. For details, see CHAPTER 25 ON-CHIP
DEBUG FUNCTION.
Cautions 1. Instructions cannot be fetched between different memory banks.
μ
μ
PD78F0889
PD78F0889 has bank areas 0 to 3 and the
2. Branch and access cannot be directly executed between different memory banks. Execute
3. Allocate interrupt servicing in the common area.
4. An instruction that extends from 7FFFH to 8000H can only be executed in memory bank 0.
B F F F H
7 F F F H
0 0 0 0 H
8 0 0 0 H
μ
branch or access between different memory banks via the common area.
PD78F0889 and 78F0890 only)
16384
Bank area 0
Figure 3-5. Internal ROM (Flash Memory) Configuration
8 bits
CHAPTER 3 CPU ARCHITECTURE
User’s Manual U17554EJ4V0UD
16384
Bank area 1
μ
PD78F0890 has bank areas 0 to 5 as illustrated below.
8 bits
Common area
32768
8 bits
16384
Bank area 2
8 bits
16384
Bank area 3
8 bits
49