參數(shù)資料
型號: M34584EDFP
元件分類: 微控制器/微處理器
英文描述: 4-BIT, OTPROM, 6 MHz, MICROCONTROLLER, PDSO42
封裝: 0.450 INCH, 0.80 MM PITCH, PLASTIC, SSOP-42
文件頁數(shù): 72/157頁
文件大?。?/td> 1130K
代理商: M34584EDFP
Rev.3.00
2004.08.06
page 21 of 155
REJ03B0010-0300Z
4584 Group
PRELIMINARY
Notice: This is not a final specification.
Some parametric limits are subject to change.
DATA MEMORY (RAM)
1 word of RAM is composed of 4 bits, but 1-bit manipulation (with
the SB j, RB j, and SZB j instructions) is enabled for the entire
memory area. A RAM address is specified by a data pointer. The
data pointer consists of registers Z, X, and Y. Set a value to the
data pointer certainly when executing an instruction to access
RAM (also, set a value after system returns from RAM back-up).
Table 2 shows the RAM size. Figure 12 shows the RAM map.
Note
Register Z of data pointer is undefined after system is released
from reset.
Also, registers Z, X and Y are undefined in the RAM back-up. After
system is returned from the RAM back-up, set these registers.
Fig. 12 RAM map
Table 2 RAM size
Part number
M34584MD/ED
RAM size
384 words 4 bits (1536 bits)
M34584MD/ED Z=0, X=0 to 15
Z=1, X=0 to 7
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
0
1
...
7
1
23
6
567
0
15
... ...
384 words
Register
Y
Register Z
Register X
RAM 384 words 4 bits (1536 bits)
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