DS80C400 Maxim, DS80C400 Datasheet - Page 97

• Manufacturer Part Number: DS80C400
• Description: The DS80C400 network microcontroller offers the highest integration available in an 8051 device
• Manufacturer: Maxim

REVISION HISTORY
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim
reserves the right to change the circuitry and specifications without notice at any time.
M a x i m I n t e g r a t e d P r o d u c t s , 1 2 0 S a n G a b r i e l D r iv e , S u n n y v a le , C A 9 4 0 8 6 4 0 8- 7 3 7 - 7 6 0 0
©
REVISION
2009 Maxim Integrated Products
NUMBER
0
1
2
3
4
5
6
7
REVISION
111202
060203
102103
111704
060805
010907
061908
DATE
6/09
New product release.
Replaced “DS2502U-E48” with “DS2502-E48.”
MOVX Characteristics (Nonmultiplexed Address/Data Bus) table: Moved MIN
spec for t
Added note for connecting the PHY to the DS80C400: “When connecting the
DS80C400 to an external PHY, do not connect the RSTOL to the reset of the
PHY. Doing so may disable the Ethernet transmit.”
Updated Figure 12: ROM Code Boot Sequence flowchart.
Corrected PSEN signal in the “Nonmultiplexed, 2-Cycle Data Memory CE0-7
Write” timing diagram.
Corrected PT2/PT3 references in Table 21 and Table 28.
Clarified where appropriate the operation of the device when ROM is disabled;
clarified the system requirements when using TINI ROM firmware.
Modified Figure 12: ROM Code Boot Sequence to better explain action of the
DS80C400 when it is searching for ROM code.
High-Speed Microcontroller User’s Guide: DS80C400 Supplement was changed
to High-Speed Microcontroller User’s Guide: Network Microcontroller
Supplement in all instances.
Added lead-free part to Ordering Information table.
Added notes explaining that the system clock must be > 25MHz to support
Ethernet 100Mbps mode.
Corrected BCUD SFR address in Buffer Control Unit section.
Updated package drawing.
In the Pin Description, replaced the Port 4 description to match the SFR
description in the High-Speed Microcontroller User’s Guide: Network
Microcontroller Supplement.
Updated Figure 12 to clarify operation when no user code was found.
Corrected the SEL (DPS.3) bit reset state from 1 to 0 in Table 2.
PXIZ
to MAX column.
97 of 97
DESCRIPTION
Maxim is a registered trademark of Maxim Integrated Products, Inc.
DS80C400 Network Microcontroller
1, 34, 72, 75,
CHANGED
29, 49, 60,
33, 40, 41,
42, 47, 51,
52, 69, 71,
73, 74, 75,
78, 79, 80,
PAGES
69, 72
82, 90
85, 87
49, 69
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94
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18
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97
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