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| 型號： | TMPR28051 |
| 英文描述： | TMPR28051 STS-1/AU-3 (STM-0) Mapper Device Advisory for Version 5 of the Device |
| 中文描述： | TMPR28051 STS-1/AU-3（的STM - 0）映射為版本的設備5設備咨詢 |
| 文件頁數(shù)： | 34/90頁 |
| 文件大?。?/td> | 1090K |
| 代理商： | TMPR28051 |
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Data Sheet
August 1999
TMPR28051 STS-1/AU-3 (STM-0) Mapper
20
Lucent Technologies Inc.
Microprocessor Interface Description
Overview
The device is equipped with an asynchronous microprocessor interface that allows operation with most commer-
cially available microprocessors. Inputs MPMUX and MPMODE are used to configure this interface into one of four
possible modes. The MPMUX setting selects either a multiplexed 8-bit address/data bus (AD[7:0]), or a demulti-
plexed 8-bit address bus (A[7:0]) and an 8-bit data bus (AD[7:0]). The MPMODE setting selects the associated set
of registers within the device.
The microprocessor interface can operate at speeds up to 33 MHz in interrupt-driven or polled mode without
wait-states. To conform to standards, there are a limited number of default powerup or reset states. All read/write
registers must be written by the microprocessor on system start-up to guarantee proper device functionality.
Microprocessor Configuration Modes
Table 12 highlights the four microprocessor modes controlled by the MPMUX and MPMODE inputs.
Table 12. Microprocessor Configuration Modes
Mode
MPMODE
MPMUX
Address/Data
Bus
DeMUXed
MUXed
DeMUXed
MUXed
Generic Control, Data, and Output Pin Names
Mode 1
Mode 2
Mode 3
Mode 4
0
0
1
1
0
1
0
1
CS, AS, DS, R/W, A[7:0], AD[7:0], INT, DTACK
CS, AS, DS, R/W, AD[7:0], INT, DTACK
CS, ALE, RD, WR, A[7:0], AD[7:0], INT, RDY
CS, ALE, RD, WR, AD[7:0], INT, RDY
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