DS5000FP_1 Datasheet, PDF (1/22 Pages) Dallas Semiconductor – Soft Microprocessor Chip

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DS5000FP
Soft Microprocessor Chip
FEATURES
§ 8051-compatible microprocessor adapts to its
task
- Accesses between 8kB and 64kB of
nonvolatile SRAM
- In-system programming via on-chip serial
port
- Can modify its own program or data
memory
- Accesses memory on a separate Byte-
wide bus
§ Crashproof operation
- Maintains all nonvolatile resources for
over 10 years
- Power-fail Reset
- Early Warning Power-fail Interrupt
- Watchdog Timer
- User-supplied lithium battery backs user
SRAM for program/data storage
§ Software security
- Executes encrypted programs to prevent
observation
- Security lock prevents download
- Unlocking destroys contents
§ Fully 8051-compatible
- 128 bytes scratchpad RAM
- Two timer/counters
- On-chip serial port
- 32 parallel I/O port pins
PIN ASSIGNMENT
P0.4/AD4
NC
NC
BA9
P0.3/AD3
BA8
P0.2/AD2
BA13
P0.1/AD1
R/W
P0.0/AD0
VCC0
VCC
VCC
P1.0
BA14
P1.1
BA12
P1.2
BA7
P1.3
NC
NC
BA6
1 64 ^{80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65}
2
63
3
62
4
61
5
60
6
59
7
58
8
57
9
56
10
55
11
54
12
13
DS5000FP
53
52
14
51
15
50
16
49
17
48
18
47
19
46
20
45
21
44
22
43
23
42
24
41
25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
P2.6/A14
NC
NC
BD3
P2.5/A13
BD2
P2.4/A12
BD1
P2.3/A11
BD0
VLI
GND
GND
P2.2/A10
P2.1/A9
P2.0/A8
XTAL1
XTAL2
P3.7/RD
P3.6/WR
P3.5/T1
NC
NC
P3.4/T0
Note: Some revisions of this device may incorporate deviations from published specifications known
as errata. Multiple revisions of any device may be simultaneously available through various sales
channels. For information about device errata, click here: http://dbserv.maxim-ic.com/errata.cfm.
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