參數(shù)資料
型號(hào)： M44C588
廠商： TEMIC SEMICONDUCTORS
元件分類(lèi)： 微控制器/微處理器
英文描述： 4-BIT, MROM, 4 MHz, MICROCONTROLLER
文件頁(yè)數(shù)： 39/44頁(yè)
文件大?。?/td> 549K
代理商： M44C588
M44C588
TELEFUNKEN Semiconductors
Rev. A1, 11-Nov-97
Preliminary Information
44 (44)
4
Extended RAM
The M44C588 contains a 256
4-bit wide extended
random access memory (XRAM). The extended RAM is
addressed by the 8-bit wide peripheral RAM address
register. This is loaded trough the auxiliary switch
register of port address C.
The extended RAM allows random access to any of the
256 data nibbles and supports postdecrement after any
WRITE access and pre-increment after any READ
access.
A peripheral RAM read access after a new address setup/
write cycle will suppress the pre-increment cycle before
the addressed data nibble is read. This will deliver the
specified data nibble on TOS.
XRAM
Data
256 x 4 bit
XRAM
address pointer
I/O bus
Figure 35. Extended RAM
5
Electrical Characteristics
5.1
Absolute Maximum Ratings
Voltages are given relative to VSS .
Parameters
Symbol
Value
Unit
Supply voltage
VDD
–0.3 to + 6.5
V
Input voltage (on any pin)
VIN
VSS –0.3 VIN VDD +0.3
V
Output short circuit duration
tshort
indefinite
sec
Operating temperature range
Tamb
–40 to +85
°C
Storage temperature range
Tstg
–40 to +130
°C
Thermal resistance (DIP40)
RthJA
110
K/W
Soldering temperature (t
≤ 10 sec)
Tsd
260
°C
Stresses greater than those listed under absolute maxi-
mum ratings may cause permanent damage to the device.
This is a stress rating only and functional operation of the
device at any condition above those indicated in the
operational section of these specification is not implied.
Exposure to absolute maximum rating condition for an
extended period may affect device reliability. All inputs
and outputs are protected against high electrostatic volt-
ages or electric fields. However, precautions to minimize
built-up of electrostatic charges during handling are
recommended. Reliability of operation is enhanced if un-
used inputs are connected to an appropriate logic voltage
level (e.g. VDD).
We reserve the right to make changes to improve technical design without further notice.
Parameters can vary in different applications. All operating parameters must be validated for each customer
application by the customer. Should the buyer use TEMIC products for any unintended or unauthorized
application, the buyer shall indemnify TEMIC against all claims, costs, damages, and expenses, arising out of,
directly or indirectly, any claim of personal damage, injury or death associated with such unintended or
unauthorized use.
TEMIC TELEFUNKEN microelectronic GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany
Telephone: 49 ( 0 ) 7131 67 2831, Fax Number: 49 ( 0 ) 7131 67 2423
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