參數(shù)資料
型號(hào): MCC5E0RX266WB0B
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 266 MHz, RISC PROCESSOR, CBGA840
封裝: 31 X 31 MM, 3.55 MM HEIGHT, 1 MM PITCH, CERAMIC, FCBGA-840
文件頁數(shù): 70/120頁
文件大?。?/td> 1711K
代理商: MCC5E0RX266WB0B
Pin Descriptions Grouped by Function
53
MOTOROLA GENERAL BUSINESS INFORMATION
C5ENPB0-DS REV 05
MRASX
C19
1
LVTTL
O
PD
Command Outputs: MRASX, MCASX, MWEX and
MCSX define the command being entered. MCSX
is considered part of the command code.
MWEX
B19
1
LVTTL
O
PD
Command Outputs: MRASX, MCASX, MWEX and
MCSX define the command being entered. MCSX
is considered part of the command code.
MCSX
A19
1
LVTTL
O
PD
Chip Select: MCSX enables (registered LOW) and
disables (registered HIGH) the command decoder.
All commands are masked when MCSX is
registered HIGH. MCSX provides the external bank
selection on systems with multiple banks. MCSX is
considered part of the command code.
MDQM
MDQML
G18
F18
1
LVTTL
O
PD
O
PD
Input/Output Mask: MDQM is an input mask
signal for write accesses and an output enable
signal for read accesses. Input data is masked
when MDQM is sampled HIGH during a WRITE
cycle. The output buffers are placed in a high Z
state (two-clock latency) when MDQM is sampled
HIGH during the READ cycle.
NOTE: MDQML is an identical copy of MDQM
used to drive the loading on SDRAM
configurations with 2 DQM pins.
MDCLK
B18
1
LVTTL
IPD
Clock: MDCLK is driven by the system clock. All
SDRAM input signals are sampled on the positive
edge of the MDCLK. MDCLK also increments the
internal burst counter and controls the output
registers.
TOTAL PINS
160
Table 25 BMU SDRAM Interface Signals (continued)
SIGNAL NAME
PIN #
TOTAL
TYPE
I/O
SIGNAL DESCRIPTION
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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