UPD78F0537DGA(T)-9EV-A NEC, UPD78F0537DGA(T)-9EV-A Datasheet - Page 47

• Manufacturer Part Number: UPD78F0537DGA(T)-9EV-A
• Description: 8BIT MCU, 128K FLASH, 7KB RAM, SMD
• Manufacturer: NEC

Specifications of UPD78F0537DGA(T)-9EV-A

• Controller Family/series: UPD78
• No. Of I/o's: 55
• Ram Memory Size: 7KB
• Cpu Speed: 20MHz
• No. Of Timers: 8
• No. Of Pwm: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 128KB
• Oscillator Type: External, Internal

3.1 Memory Space
Products in the 78K0/KE2 can access a 64 KB memory space. Figures 3-1 to 3-8 show the memory maps.
Cautions 1. Regardless of the internal memory capacity, the initial values of the internal memory size
Notes 1. The ROM and RAM capacities of the products with the on-chip debug function can be debugged
PD78F0531
PD78F0532
PD78F0533
PD78F0534
PD78F0535
PD78F0536
PD78F0537, 78F0537D
Flash Memory Version
(78K0/KE2)
2. The PD78F0536, 78F0537, and 78F0537D have internal ROMs of 96 KB and 128 KB, respectively.
2. To set the memory size, set IMS and then IXS. Set the memory size so that the internal ROM
according to the debug target products. Set IMS and IXS according to the debug target products.
However, the set value of IMS of these devices is the same as those of the 48 KB product because
memory banks are used. For how to set the memory banks, see 4.3 Memory Bank Select Register
(BANK).
switching register (IMS) and internal expansion RAM size switching register (IXS) of all
products in the 78K0/KE2 are fixed (IMS = CFH, IXS = 0CH).
corresponding to each product as indicated below.
and internal expansion RAM areas do not overlap.
Table 3-1. Set Values of Internal Memory Size Switching Register (IMS)
Note 1
04H
C6H
C8H
CCH
CCH
CCH
CFH
and Internal Expansion RAM Size Switching Register (IXS)
IMS
Note 2
Note 2
CHAPTER 3 CPU ARCHITECTURE
0CH
0AH
0BH
04H
00H
User’s Manual U17260EJ6V0UD
IXS
16 KB
24 KB
32 KB
48 KB
60 KB
96 KB
128 KB
Capacity
ROM
Note 2
Note 2
768 bytes
1 KB
Internal High-Speed
RAM Capacity
Therefore, set the value
1 KB
2 KB
4 KB
6 KB
Internal Expansion
RAM Capacity
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