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| 型號： | C3ENPB0-DS |
| 英文描述： | 4 Mbit (512 Kbit x 8) ZEROPOWER® SRAM |
| 中文描述： | ? - 3E的網(wǎng)絡(luò)處理器的數(shù)據(jù)資料硅修訂買0 |
| 文件頁數(shù)： | 51/114頁 |
| 文件大?。?/td> | 1893K |
| 代理商： | C3ENPB0-DS |
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Pin Descriptions Grouped by Function
51
MOTOROLA GENERAL BUSINESS INFORMATION
C3ENPA1-DS/D REV 03
BMU SDRAM Interface
Signals
The BMU and SDRAM interface signals are described in
Table 22
.
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 22
BMU SDRAM Interface Signals
SIGNAL NAME
PIN #
TOTAL
TYPE
I/O
SIGNAL DESCRIPTION
MD0 - MD129
AA27, AA25, AA24, AA23, AA21,
AA20, Y27, Y26, Y25, Y23, Y22, Y21,
Y20, W27, W26, W25, W23, W22,
W21, W20, V27, V25, V24, V23, V21,
V20, U27, U26, U25, U24, U23, U22,
U21, U20, T27, T26, T25, T23, T22,
T21, T20, R27, R26, R25, R24, R23,
R22, R21, R20, P27, P25, P24, P23,
P21, P20, N27, N26, N25, N24, N23,
N22, N21, N20, M27, M26, M25,
M23, M22, M21, M20, L27, L26, L25,
L24, L23, L22, L21, L20, K27, K25,
K24, K23, K21, K20, J27, J26, J25,
J23, J22, J21, J20, H27, H26, H25,
H23, H22, H21, H20, G27, G25, G24,
G23, G21, G20, F27, F26, F25, F24,
F23, F22, F21, F20, E27, E26, E25,
E23, E22, E21, E20, D27, D25, D24,
D23, D21, D20, C27, C26, C25, C23,
C22
130
LVTTL
I
PD
/O Data Lines In
MDECC0 - MDECC8 A27, B20, B21, B23, B24, B25, B27,
C20, C21
9
LVTTL
I
PD
/O Stored as data, ECC bits
MA0 - MA11
C19, B19, A19, F18, E18, D18, C18,
A18, F17, E17, D17, C17
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
F19, E19
2
LVTTL
O
PD
Bank Address Outputs: BA0 and BA1 define which
bank the ACTIVE, READ, WRITE or PRECHARGE
command is being applied
MCASX
A24
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.
F
n
.
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