UPD77111 NEC, UPD77111 Datasheet - Page 29

• Manufacturer Part Number: UPD77111
• Description: 16-BIT FIXED-POINT DIGITAL SIGNAL PROCESSORS
• Manufacturer: NEC

7.2 Data Memory
7.2.1 Data memory map
the memory capacity and memory type differ depending on the product.
The data memory space consists of an X memory space and a Y memory space of 64K words
Caution Programs and data cannot be placed at addresses reserved for the system, nor can these
0xFFFF
0x8000
0x7FFF
0x4000
0x3FFF
0x3840
0x383F
0x3800
0x37FF
0x3000
0x2FFF
0x2000
0x1FFF
0x1000
0x0FFF
0x0000
addresses be accessed. If these addresses are accessed, the normal operation of the device
cannot be guaranteed.
External data
memory
(32K words)
(16K words)
(64 words)
(4K words)
(4K words)
Data RAM
Data RAM
Data RAM
Peripheral
PD77110
System
System
System
0x0C00
0x0BFF
Data Sheet U12801EJ4V0DS00
(16K words)
Data ROM
(64 words)
(3K words)
Peripheral
Data RAM
PD77111
System
System
System
PD77110, 77111, 77112
0xC000
0xBFFF
External data
memory
(16K words)
(16K words)
Data ROM
(64 words)
(3K words)
Peripheral
Data RAM
PD77112
System
System
System
16 bits each, and
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