W741C260 Datasheet, PDF (7/92 Pages) Winbond – 4-BIT MICROCONTROLLER

W741C260
000H
16 bits
2048
address
TABH TABL ACC
-xxx xxxx xxyy
Offset
011x xxxx xxxx
600H
3210
7FFH
2048 x 16-bit
ROM address = 600H + Offset/4
This area can be used to store both instruction code
and look-up table
Each element (4 bits) of the look-up table
Figure 1. Program Memory Organization
Data Memory (RAM)
1. Architecture
The static data memory (RAM) used to store data is arranged as 128 × 4 bits. The data memory can
be addressed directly or indirectly. The organization of the data memory is shown in Figure 2.
4 bits
00H
: Working Register
0FH
128
address
7FH
128 x 4-bit
Figure 2. Data Memory Organization
The first sixteen addresses (00H to 0FH) in the data memory are known as the working registers
(WR). The other data memory is used as general memory and cannot operate directly with immediate
data. The relationship between data memory locations and the page register (PAGE) in indirect
addressing mode is described in the next section.
Publication Release Date: March 1998
-7-
Revision A3