- Timestamp:
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12/17/11 01:45:59 (13 years ago)
- Author:
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Ivaylo
- Comment:
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19 | 19 | = Specifications = |
20 | 20 | |
21 | | MBX821 models include |
22 | | 40 MHz MPC821 processor; |
23 | | PC104-Plus; 10BaseT Ethernet; |
24 | | EIDE and Floppy interfaces; |
25 | | 32KB NVRAM; |
26 | | keyboard, mouse, IR, COM1 and COM2 ports; |
27 | | LCD panel connector |
28 | 21 | |
29 | 22 | = Processor = |
30 | 23 | |
31 | | MBX821 models include 40 MHz MPC821 processor. The MPC821 processor is especially well-suited for applications where |
32 | | lower power is essential, such as portable andor high-performance |
33 | | communications systems. The CPU on the MPC821 is a 32-bit PowerPC |
34 | | implementation incorporating memory management units (MMUs) and |
35 | | instructiondata caches. It has a real-time clock and a communications |
36 | | processor module that includes serial communication controllers, serial |
37 | | management controllers, a serial peripheral interface (SPI) channel, and an |
38 | | Interprocessor-Integrated Controller (I2C) channel for data exchanges |
39 | | between the MPC821 and other ICs with I2C capability. The MPC821’s |
40 | | memory controller supports all available types of memory. Its PCMCIA |
41 | | controller supports up to two PCMCIA devices (one socket is provided on |
42 | | the MBX). The MPC821 also incorporates an LCD controller for display |
43 | | capability. |
44 | 24 | |
45 | 25 | = DRAM = |
46 | 26 | |
47 | | The MBX821-002b has 4MB of DRAM, soldered in place. The MBX series embedded controller has provision for either 4MB or |
48 | | 16MB of on-board DRAM, soldered in place. In addition, it |
49 | | accommodates 8MB to 128MB of expansion DRAM in a 168-pin DIMM |
50 | | (dual in-line memory module) socket, XU3. |
51 | | The on-board DRAM is composed of two 16-bit devices (either 1M x 16 |
52 | | or 4M x 16). Parity protection is optional |
53 | 27 | |
54 | 28 | = Flash Memory = |
55 | 29 | |
56 | | Flash memory on the MBX821-002b embedded controller consists of 4MB. Flash memory on the MBX series embedded controller consists of 2MB, |
57 | | 4MB, or 8MB of memory in one bank of four devices soldered directly to |
58 | | the board. The EPPCBug firmware resident in Flash memory is originally |
59 | | loaded at the factory, but the Flash contents can be reprogrammed if |
60 | | necessary. |
61 | 30 | |
62 | 31 | = IO = |
63 | 32 | |
64 | | Serial IO - EIA-232-D serial console or terminal port (DCEDTE) |
65 | | Parallel IO - IEEE 1284 parallel port with hostperipheral mode selection |
66 | | Ethernet IO - Support for AUI and 10BaseT Ethernet interface |
67 | | PCMCIA interface - One PCMCIA slot (type I, II, or III devices) |
68 | | LCD interface (MPC821 only) - Support for both active and passive LCD panels via 24-pin header on MPC821-powered MBX boards |
69 | | Floppy disk controller - Support for direct ribbon cable connection to 2.88MB floppy disk drive via header on MBX board |
70 | | Keyboardmouse interface - Support for keyboard and mouse input via header on MBX board |
71 | 33 | |
72 | 34 | = NVRAM = |
73 | 35 | |
74 | | The MBX821-001 embedded controller accommodates 32KB of non- volatile RAM (NVRAM). The MBX series embedded controller accommodates 32KB of Non-Volatile RAM (NVRAM) in a 34-pin socket, XU2. A battery within the |
75 | | device supplies VCC to the NVRAM when main power is removed. The |
76 | | NVRAM provides for a low-battery indication which can be read by the |
77 | | processor. The first 4K of the NVRAM contains the vital product data (VPD) and |
78 | | should not be used. The remaining NVRAM is available for general use. |
79 | 36 | |
80 | 37 | = Battery = |
81 | 38 | |
82 | | MBX series embedded controllers can use 3.0V–3.6V battery power |
83 | | (either on board, or external via utility connector #1) as a backup power |
84 | | source for the “keep-alive” power circuits (such as the real-time clock) in |
85 | | the processor. |
86 | | The lifetime of the battery is very dependent on the ambient temperature |
87 | | of the board and the power-on duty cycle. At 70° C, the worst-case elapsed |
88 | | time for battery protection is four years. Battery warning time is 24 hours |
89 | | minimum. At lower ambient temperatures the backup time is greatly |
90 | | extended. |
91 | | When a board is stored, the on-board battery should be disconnected to |
92 | | prolong battery life. This is especially important at high ambient |
93 | | temperatures. |
94 | 39 | |
95 | | = Block diagram = |
| 40 | = =Block diagram== |
96 | 41 | |
97 | 42 | [wiki:FileBlock_diagram.png FileBlock diagram.png] |
98 | 43 | |
99 | | = =References== |
100 | 44 | |
101 | | httpwww.emersonnetworkpower.comen-USProductsEmbeddedComputingDocumentsDocumentationArchiveTechnicalDocumentation02mbxapg.pdf |
102 | | httpwww.equinox-tech.comdownloadsfreescaleMBXA_IH3.pdf |
| 45 | ==References== |
| 46 | |
| 47 | http://www.emersonnetworkpower.com/en-US/Products/EmbeddedComputing/Documents/DocumentationArchive/TechnicalDocumentation/02/mbxapg.pdf |
| 48 | http://www.equinox-tech.com/downloads/freescale/MBXA_IH1.pdf |