UPD77112GC データシートの表示（PDF） - NEC => Renesas Technology

部品番号

コンポーネント説明

メーカー

UPD77112GC

16-BIT FIXED-POINT DIGITAL SIGNAL PROCESSORS

NEC => Renesas Technology 

µPD77110, 77111, 77112

6.2 STOP Mode

To set this mode, execute the STOP instruction. In this mode, all the functions, including the clock circuit and

PLL, are stopped and the power consumption is minimized with only leakage current flowing.

To release the STOP mode, use hardware reset or WAKEUP pin.

When releasing the STOP mode by using the WAKEUP pin, the contents of the internal registers and memory are

retained, but it takes several 100 µs to release the mode.

The WAKEUP pin is multiplexed with the INT4 pin. Usually, this pin functions as an interrupt pin, but functions as

the WAKEUP pin when it is asserted active in the STOP mode. Whether the WAKEUP pin is used to release the

STOP mode is selected by mask option. For details, refer to 8.2 WAKEUP Function and 8.3.2 WAKEUP function.

7. MEMORY MAP

A Harvard architecture, in which the instruction memory space and data memory space are separated is

employed.

7.1 Instruction Memory

7.1.1 Instruction memory map

The instruction memory space consists of 64K words × 32 bits, and the capacity and type of the memory differ

depending on the product.

0xFFFF

0xC000

0xBFFF

µPD77110

System

µPD77111, 77112

0xBF00

0xBEFF

System

Internal instruction

RAM

(32K words)

Internal instruction

ROM

(31.75K words)

0x4000

0x3FFF

System

0x1000

0x0FFF

Internal instruction RAM

0x0240

(3.5K words)

0x023F

0x0200 Vector area (64 words)

0x01FF

System

0x0100

0x00FF Boot-up ROM

0x0000

(256 words)

System

0x0600

0x05FF Internal instruction RAM

(1K words)

Vector area (64 words)

System

Boot-up ROM

(256 words)

Caution Programs and data cannot be placed at addresses reserved for the system, nor can these

addresses be accessed. If these addresses are accessed, the normal operation of the device

cannot be guaranteed.

Data Sheet U12801EJ4V0DS00

27

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