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參數(shù)資料
| 型號： | ELANSC310 |
| 英文描述： | Elan SC310 - Elan SC310 Single-Chip. 32-Bit. PC/AT Microcontroller |
| 中文描述： | 義隆SC310 -伊蘭SC310單芯片。 32位。的PC / AT單片機 |
| 文件頁數(shù)： | 75/119頁 |
| 文件大?。?/td> | 1167K |
| 代理商： | ELANSC310 |
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lanSC310 Microcontroller Data Sheet
59
PREL IMINARY
ALTERNATE PIN FUNCTIONS
To provide the system designer with the most flexibility,
the lanSC310 microcontroller provides a means for
reconfiguring some of the pin functions, depending on
the system requirements. Reconfiguration of the
lanSC310 microcontroller pin functions is accom-
plished in one of two ways, depending on the pin func-
tions that are to be reconfigured. To select the CPU
local bus interface or maximum ISA bus interface, the
state of the DTR and RTS pins are sampled on the ris-
ing edge of the RESIN and IORESET signals when
power is first applied to the lanSC310 microcontroller.
This is shown in Figure 8.
After power has been initially applied and RESIN and
IORESET are deasserted, additional assertions of
IORESET while RESIN = 1 will not cause the pin con-
figurations to change. However, the pin configuration
inputs are always sampled in response to RESIN as-
sertions. Table 26 shows the pin states at reset to en-
able the two different pin configurations involving the
Local Bus and Maximum ISA Bus. The bus configura-
tion selected can be read in bits 5–6 of the Memory
Configuration 1 Register, Index 66h, after the reset.
.
The second method of reconfiguring lanSC310 micro-
controller pin functions is accomplished by program-
ming the internal configuration registers. This method
is used to configure the following functions:
n DRAM or SRAM main memory interface
n Unidirectional or bidirectional parallel port
n Clock source driving the X1OUT[BAUDOUT] pin
n 14.336-MHz clock
Table 26.
Bus Option Select Bit Logic
Bus Selected
DTR/CFG1
RTS/CFG0
Local Bus
10
Full/Maximum ISA
11
VCC
RESIN and
IORESET
RTS
DTR
DTR and RTS sampled at
the rising edge of RESIN and IORESET
Notes:
This is shown to illustrate when CFG0 and CFG1 are sampled and is not intended to be used for reset timings. For reset timings,
refer to Table 45 on page 88.
Figure 8.
Bus Option Configuration Select
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ELANSC310-25 | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:Single-Chip, 32-Bit, PC/AT Microcontroller |
| ELANSC310-25KC | 制造商:ADVANCED MICRO DEVICES,INC 功能描述: |
| ELANSC310-25KI | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:Single-Chip, 32-Bit, PC/AT Microcontroller |
| ELANSC310-25VC | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Advanced Micro Devices 功能描述: 制造商:AMD 功能描述: |
| ELANSC310-33 | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:Single-Chip, 32-Bit, PC/AT Microcontroller |
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