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參數(shù)資料
| 型號： | 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)： | 69/120頁 |
| 文件大小： | 1711K |
| 代理商： | MCC5E0RX266WB0B |
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52
CHAPTER 2: SIGNAL DESCRIPTIONS
C5ENPB0-DS REV 05
MOTOROLA GENERAL BUSINESS INFORMATION
BMU SDRAM Interface
Signals
The BMU and SDRAM interface signals are described in Table 25.
The BMU is designed to support SDRAM devices with 12 address lines. All 139 data lines
and all 12 address lines must be connected to the SDRAM in order for the BMU to be able
to read and write external SDRAM properly.
Table 25 BMU SDRAM Interface Signals
SIGNAL NAME
PIN #
TOTAL
TYPE
I/O
SIGNAL DESCRIPTION
MD0 - MD129
U23, U22, U21, T29, T28, T27, T26,
T25, T24, T23, T22, T21, R29, R28,
R27, R26, R25, R24, R23, R22, R21,
P29, P28, P26, P25, P24, P22, P21,
N29, N27, N26, N25, N23, N22, N21,
M29, M28, M27, M26, M25, M24,
M23, M22, M21, L29, L28, L27, L26,
L25, L24, L23, L22, L21, K29, K28,
K26, K25, K24, K22, K21, J29, J27,
J26, J25, J23, J22, J21, H29, H28,
H27, H26, H25, H24, H23, H22, H21,
G29, G28, G27, G26, G25, G24, G23,
G22, G21, F29, F28, F26, F25, F24,
F22, F21, E29, E27, E26, E25, E23,
E22, E21, D29, D28, D27, D26, D25,
D24, D23, D22, D21, C29, C28, C26,
C25, C24, C22, C21, B29, B27, B26,
B25, B23, B22, B21, A29, A28, A27,
A26, A25, A24, A23, A22
130
LVTTL
I
PD/O
Data Lines
MDECC0 - MDECC8 E19, F19, G19, A20, C20, D20, F20,
G20, A21
9
LVTTL
I
PD/O
Stored as data, ECC bits
MA0 - MA11
B16, C16, D16, E16, F16, G16, A17,
B17, D17, E17, F17, G17
12
LVTTL
O
PD
Address Outputs: A0-A11 are sampled during the
ACTIVE command and READ/WRITE to select one
location out of the memory array in the respective
bank. The address inputs also provide the
op-code during a LOAD MODE REGISTER
command
MBA0 - MBA1
E18, C18
2
LVTTL
O
PD
Bank Address Outputs: BA0 and BA1 define which
bank the ACTIVE, READ, WRITE or PRECHARGE
command is being applied
MCASX
D19
1
LVTTL
O
PD
Command Outputs: MRASX, MCASX, MWEX and
MCSX define the command being entered.
NOTE: MCSX is considered part of the command
code.
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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