您的位置：维库电子市场网 > Datasheet > ELANSC300-33KI

ELANSC300-33KI Datasheet

  • ELANSC300-33KI

  • Highly Integrated, Low-Power, 32-Bit Microcontroller

  • 1344.13KB

  • 139页

  • AMD

阅览下载 纠错 0

扫码查看芯片数据手册

上传产品规格书

PDF预览

P R E L I M I N A R Y
For more information about the
ROMCS
pin, see the
Using 16-Bit
ROMCS
Designs in 脡lan
TM
SC300 and
脡lanSC310 Microcontrollers Application Note
, order
#21825.
This is a dual-function pin. When the JTAGEN signal is
asserted, it will function as the TDO, JTAG Test Data
Out pin. See 鈥淛TAG Boundary Scan Interface鈥?on page
44 for more information on the function of this pin dur-
ing Test mode.
ENDIRH
SYSTEM INTERFACE
AEN [TDI]
High Byte Data Buffer Direction Control
(Output; Active High)
This output controls the transceiver on the high byte of
the data bus, bits 15鈥?. When asserted, this signal is
used to enable the data from the 脡lanSC300 microcon-
troller data bus to the buffered data bus.
ENDIRL
DMA Address Enable (Output; Active High)
AEN is used to indicate that the current address active
on the SA23鈥揝A0 address bus is a memory address
and that the current cycle is a DMA cycle. All I/O de-
vices should use this signal in decoding their I/O ad-
dresses and should not respond when this signal is
asserted. When AEN is asserted, the DACKx signals
are used to select the appropriate I/O device for the
DMA transfer.
This is a dual-function pin. When the JTAGEN signal is
asserted, it functions as the TDI, JTAG Test Data Input
pin.
D15鈥揇0
Low Byte Data Buffer Direction Control
(Output; Active High)
This output controls the transceiver on the low byte of
the data bus, bits 7鈥?. When asserted, this signal is
used to enable the data from the 脡lanSC300 microcon-
troller data bus to the buffered data bus.
IOCHRDY
System Data Bus (Bidirectional; Active High)
The System Data Bus inputs data during memory and
I/O read cycles, and outputs data during memory and
I/O write cycles. During Local Bus and DRAM/SRAM
cycles, this bus represents the CPU data bus.
DACK2 [TCK]
I/O Channel Ready (Input; Active High)
This signal is used by ISA slave devices to add wait
states to the current transfer. When this signal is deas-
serted, wait states are added.
IOCS16 [LCDDL0]
(Input; Active Low)
This input is used to signal to the ISA control logic that
the targeted I/O device is a 16-bit device.
(IOCS16 is available unless the internal LCD Controller
Bus mode is selected and a dual-scan LCD panel inter-
face is selected via firmware.)
IOCS16
is generated by a 16-bit ISA I/O expansion
DMA Channel 2 Acknowledge (Output; Active Low)
This output indicates that the current transfer is a DMA
transfer to the I/O device connected to this DMA chan-
nel. In PC-compatible system designs, this signal can
be connected to the floppy disk controller DMA ac-
knowledge input.
This is a dual-function pin. When the JTAGEN signal is
asserted, it functions as the TCK (JTAG Test Clock)
pin. See 鈥淛TAG Boundary Scan Interface鈥?on page 44
for more information on the function of this pin during
Test mode.
DBUFOE
board when the board recognizes it is being ad-
dressed.
IOCS16
provides the same function for 16-bit
I/O expansion devices as the
MCS16
signal provides for
the 16-bit memory devices.
Note:
IOCS16
is internally OR鈥檇 with
MCS16
. Do not tie
IOCS16
Low.
For more information about the
IOCS16
pin, see the
Using 16-Bit
ROMCS
Designs in 脡lan
TM
SC300 and
脡lanSC310 Microcontrollers Application Note
, order
#21825.
IOR
Data Buffer Output Enable (Output; Active Low)
This output is used to control the output enable on the
system data bus buffer. When Low, the outputs of the
Data Bus Buffer are enabled.
DRQ2 [TDO]
DMA Channel 2 Request (Input; Active High
with Internal Pulldown)
This input is used to request a DMA transfer. It can be
connected to the floppy disk controller DMA request
output in PC-compatible system designs.
I/O Read Command (Output; Active Low)
The IOR signal indicates that the current cycle is a read
of the currently selected I/O device. When this signal is
asserted, the selected I/O device can drive data onto
the data bus.
脡lan鈩C300 Microcontroller Data Sheet
35

ELANSC300-33KI相关型号PDF文件下载

您可能感兴趣的PDF文件资料

热门IC型号推荐

©2024 维库电子市场网（www.dzsc.com）　备案号：浙B2-20050339-1 经营许可证：浙B2-20210386版权声明
买家服务热线：0571-85317607 | 买家服务部QQ： QQ:1609526468
卖家服务热线：0571-85317607 | 卖家服务部QQ： QQ:331652727

扫码下载APP，
一键连接广大的电子世界。

在线人工客服

买家服务：
卖家服务：

0571-85317607

客服在线时间周一至周五
9:00-17:30

关注官方微信号，
第一时间获取资讯。

建议反馈
返回顶部

建议反馈

联系人：

联系方式：

按住滑块，拖拽到最右边
>>
感谢您向阿库提出的宝贵意见，您的参与是维库提升服务的动力！意见一经采纳，将有感恩红包奉上哦！

PDF纠错X

投诉电话：0571-85317607 投诉QQ：

如选匿名将无法为您反馈投诉结果，建议实名投诉！