UPD78F0537DGA(T)-9EV-A NEC, UPD78F0537DGA(T)-9EV-A Datasheet - Page 571

• 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

26.2 Internal Expansion RAM Size Switching Register
(IXS).
The internal expansion RAM capacity can be selected using the internal expansion RAM size switching register
IXS is set by an 8-bit memory manipulation instruction.
Reset signal generation sets IXS to 0CH.
Caution Be sure to set each product to the values shown in Table 26-2 after a reset release.
Caution To set memory size, set IMS and then IXS. Set memory size so that the internal ROM area and
Note
Address: FFF4H
Symbol
IXS
The internal expansion RAM capacity of the products with the on-chip debug function can be debugged
according to the debug target products. Set IXS according to the debug target products.
internal expansion RAM area do not overlap.
µ
µ
µ
µ
µ
µ
µ
PD78F0531
PD78F0532
PD78F0533
PD78F0534
PD78F0535
PD78F0536
PD78F0537, 78F0537D
Figure 26-2. Format of Internal Expansion RAM Size Switching Register (IXS)
IXRAM4
Table 26-2. Internal Expansion RAM Size Switching Register Settings
7
0
0
0
0
0
0
After reset: 0CH
Flash Memory Versions (78K0/KE2)
IXRAM3
6
0
1
1
1
0
0
Note
Other than above
R/W
CHAPTER 26 FLASH MEMORY
IXRAM2
User’s Manual U17260EJ6V0UD
5
0
1
0
0
1
0
IXRAM4
IXRAM1
4
0
1
0
0
0
IXRAM0
IXRAM3
0CH
0AH
08H
04H
00H
3
0
0
0
0
0
Internal expansion RAM capacity selection
0 byte
1024 bytes
2048 bytes
4096 bytes
6144 bytes
Setting prohibited
IXRAM2
IXS Setting
2
IXRAM1
1
IXRAM0
0
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