GMS81508A データシートの表示（PDF） - Hynix Semiconductor

部品番号

コンポーネント説明

メーカー

GMS81508A

USER’S MANUAL

Hynix Semiconductor 

HYUNDAI MicroElectronics

2.2. MEMORY SPACE

All RAM ,ROM,I/O, Peripheral Register are placed in the same memory area. Therefore, same

instructions enable both data transfer and operation without the need to distinguish memory and

I/O. The program counter of GMS81508/16 consists of 16-bit and memory addressing space is 64K

byte.

2.2.1. RAM area

RAM(includes stack area) is 448 Bytes ( 0000H 01FFH ).

The internal RAM is used for data storage, subroutine calling or stack area when interrupts occur.

When RAM is used as the stack area, the depth of the subroutine "nesting" and the interrupt levels

should be kept in mind in order to avoid destruction of the RAM contents.

2.2.2. Peripheral Register area

Address 00C0H 00FFH are assigned for peripheral register.

2.2.3. Program ROM area


PCALL subroutines must be located in PCALL area ( FF00H FFBFH ).


TCALL vector area ( FFC0H FFDFH ) has the vector address corresponding to TCALL

instruction.


Interrupt Vector area ( FFE0H FFFFH ) has the vector address of interrupts, inclusive RESET.

12

Share Link: