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MCF5251CEVM140 Datasheet(PDF) 7 Page - Freescale Semiconductor, Inc

tên linh kiện MCF5251CEVM140
Nội dung chi tiết  ColdFire Processor
tải về  32 Pages
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nhà sản xuất  FREESCALE [Freescale Semiconductor, Inc]
Trang chủ  http://www.freescale.com
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Signal Description
MCF5251 ColdFire Processor Data Sheet: Technical Data, Rev. 2.1
Freescale Semiconductor
7
ISA bus read strobe
IDE_DIOR/GPIO31
(CS2)
1 ISA bus read strobe and 1 ISA bus
write strobe—allow connection of an
independent ISA bus peripheral,
such as an IDE slave device.
In/Out
ISA bus write strobe
IDE_DIOW/GPIO32
(CS2)
In/Out
ISA bus wait signal
IDE_IORDY/GPIO33
ISA bus wait line available for both
busses
In/Out
Chip Selects[2:0]
CS0/CS4
CS1/QSPICS3/GPIO28
Chip selects bits 2 through 0—
enable peripherals at programmed
addresses. CS0 provides boot ROM
selection.
Out
In/Out
negated
Buffer enable 1
BUFENB1/GPIO29
Two programmable buffer
enables—allow seamless steering of
external buffers to split data and
address bus in sections.
In/Out
Buffer enable 2
BUFENB2/GPIO30
In/Out
Transfer acknowledge
TA/GPIO12
Transfer Acknowledge signal.
In/Out
Wake Up
WAKEUP/GPIO21
Wake-up signal input
In
Serial Clock Line
SCL0/SDATA1_BS1/GPIO41
SCL1/TXD1/GPIO10
Clock signal for Dual I2C module
operation
In/Out
Serial Data Line
SDA0/SDATA3/GPIO42
SDA1/RXD1/GPIO44
Serial data port for second I2C
module operation
In/Out
Receive Data
SDA1/RXD1/GPIO44
RXD0/GPIO46
EF/RXD2/GPIO6
Receive serial data input for UART
In
Transmit Data
SCL1/TXD1/GPIO10
TXD0/GPIO45
XTRIM/TXD2/GPIO0
Transmit serial data output for UART
Out
Request-To-Send
DDATA3/RTS0/GPIO4
DDATA1/RTS1/SDATA2_BS2/GPIO2
Signals sent from UART0/1 that it is
ready to receive data
Out
Clear-To-Send
DDATA2/CTS0/GPIO3
DDATA0/CTS1/SDATA0_SDIO1/GPIO1
Signals sent to UART0/1 that data
can be transmitted to peripheral
In
Timer Output
SDATAO1/TOUT0/GPIO18
Capability of output waveform or
pulse generation
Out
IEC958 inputs
EBUIN1/GPIO36
EBUIN2/SCLKOUT/GPIO13
EBUIN3/CMD_SDIO2/GPIO14
QSPICS0/EBUIN4/GPIO15
Audio interfaces to IEC958 inputs
In
IEC958 outputs
EBUOUT1/GPIO37
QSPICS1/EBUOUT2/GPIO16
Audio interfaces to IEC958 outputs
Out
Serial data in
SDATAI1/GPIO17
SDATAI3/GPIO8
Audio interfaces to serial data inputs
In
Table 3. MCF5251 Signal Index (continued)
Signal Name
Mnemonic
Function
Input/
Output
Reset
State



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