参数资料
型号: MPM22CGA800A
厂商: INTEL CORP
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 800 MHz, MICROPROCESSOR, XMA
封装: MMC-2
文件页数: 5/68页
文件大小: 966K
代理商: MPM22CGA800A
Pentium
III Processor Mobile Module MMC-2
Featuring Intel
SpeedStep Technology
243356-006
Datasheet
7
3.1.2
Memory Signal Description
Table 2 provides descriptions of the memory interface signals.
Table 2.
Memory Signal Descriptions
Name
Type
Voltage
Description
MECC[7:0]
I/O
CMOS
V_3
Memory ECC Data: These signals carry Memory ECC data during
access to DRAM.
ECC is not supported on Intel mobile modules.
CSA[5:O]#
O
CMOS
V_3
Chip Select (SDRAM): These pins activate the SDRAMs. SDRAM
accepts any command when its CS# pin is active low.
DQMA[7:0]
O
CMOS
V_3
Input/Output Data Mask (SDRAM): These pins act as synchronized
output enables during a read cycle and as a byte mask during a write
cycle.
MAB[9:0]#
MAB[10]
MAB[12:11]#
MAB[13]
O
CMOS
V_3
Memory Address (SDRAM): This is the row and column address for
DRAM. The 82443BX Host Bridge system controller has two identical
sets of address lines (MAA and MAB#). The mobile module supports
only the MAB set of address lines. For additional addressing features,
please refer to the Intel
440BX AGPSet: 82443BX Host Bridge/
Controller Datasheet (Order Number: 290633-001).
MWEA#
O
CMOS
V_3
Memory Write Enable (SDRAM): MWEA# should be used as the
write enable for the memory data bus.
SRASA#
O
CMOS
V_3
SDRAM Row Address Strobe (SDRAM): When active low, this
signal latches Row Address on the positive edge of the clock.
SRASA# also allows Row access and pre-charge.
SCASA#
O
CMOS
V_3
SDRAM Column Address Strobe (SDRAM): When active low, this
signal latches Column Address on the positive edge of the clock.
SCASA# also allows Column access.
CKE[5:0]
O
CMOS
V_3
SDRAM Clock Enable (SDRAM): SDRAM clock enable pin. When
these signals are deasserted, SDRAM enters power-down mode.
Each row is individually controlled by its own clock enable.
MD[63:0]
O
CMOS
V_3
Memory Data: These signals are connected to the DRAM data bus
and, they are not terminated on the mobile module.
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