EM73962A
4-BIT MICROCONTROLLER
Increment
Address
Bank 0
000h - 00Fh
Zero-page
010h - 01Fh
020h - 02Fh
:
:
:
0C0h - 0CFh
0D0h - 0DFh
Level 0
Level 4
Level 8
Level 12
Level 1
Level 5
Level 2
Level 6
Level 3
Level 7
0E0h - 0EFh
0F0h - 0F3h
Level 9 Level 10 Level 11
Bank 1
100h - 10Fh
110h - 11Fh
:
:
:
160h - 16Fh
170h - 17Fh
ZERO- PAGE:
From 000h to 00Fh is the location of zero-page. It is used as the pointer in zero -page addressing mode for the
instruction of "STD #k,y; ADD #k,y; CLR y,b; CMP k,y".
PROGRAM EXAMPLE: To wirte immediate data "07h" to address "003h" of RAM and to clear bit 2 of RAM.
STD #07h, 03h ; RAM[03] ← 07h
CLR 0Eh,2 ; RAM[0Eh]2 ←0
STACK:
There are 13 - level (maximum) stack for user using for subroutine (including interrupt and CALL). User
can assign any level be the starting stack by giving the level number to stack pointer(SP).
When user using any instruction of CALL or subroutine, before entry the subroutine, the previous PC address
will be saved into stack until return from those subroutines, the PC value will be restored by the data saved
in stack.
DATA AREA:
Except the special area used by user, the whole RAM can be used as data area for storing and loading general
data.
ADDRESSING MODE
The 372 nibble data memory consists of two banks (bank 0 and bank 1). There are 244x4 bits (address
000h~0F3h) on bank 0 and 128x4 bits (address 100h~17Fh) on bank 1.
* This specification are subject to be changed without notice.
10.8.2001
6
ELAN [ ELAN MICROELECTRONICS CORP ]
