DS33Z41 Quad IMUX Ethernet Mapper

 

 

 

 

 

 

NAME

PIN

TYPE

FUNCTION

 

 

 

 

 

 

 

 

 

SDRAM CONTROLLER

 

SDATA[0]

M1

 

 

 

SDATA[1]

L2

 

 

 

SDATA[2]

N1

 

 

 

SDATA[3]

M2

 

 

 

SDATA[4]

N2

 

 

 

SDATA[5]

N4

 

 

 

SDATA[6]

N3

 

 

 

SDATA[7]

L4

 

 

 

SDATA[8]

J3

 

 

 

SDATA[9]

M3

 

 

 

SDATA[10]

H3

 

 

 

SDATA[11]

J1

 

 

 

SDATA[12]

J2

 

SDRAM Data Bus Bits 0 to 31: The 32 pins of the SDRAM data bus

 

SDATA[13]

K1

 

 

SDATA[14]

K2

 

are inputs for read operations and outputs for write operations. At all

 

SDATA[15]

L1

IOZ

other times, these pins are high impedance.

 

SDATA[16]

M12

 

 

 

Note: All SDRAM operations are controlled entirely by the DS33Z41.

 

SDATA[17]

H11

 

 

SDATA[18]

M11

 

No user programming for SDRAM buffering is required.

 

SDATA[19]

N13

 

 

 

SDATA[20]

N11

 

 

 

SDATA[21]

L13

 

 

 

SDATA[22]

N12

 

 

 

SDATA[23]

K13

 

 

 

SDATA[24]

J13

 

 

 

SDATA[25]

J12

 

 

 

SDATA[26]

H13

 

 

 

SDATA[27]

H12

 

 

 

SDATA[28]

G12

 

 

 

SDATA[29]

F11

 

 

 

SDATA[30]

G11

 

 

 

SDATA[31]

L10

 

 

 

SDA[0]

N9

 

 

 

SDA[1]

N10

 

SDRAM Address Bus 0 to 11. The 12 pins of the SDRAM address bus

 

SDA[2]

L11

 

 

SDA[3]

K11

 

output the row address first, followed by the column address. The row

 

SDA[4]

L7

 

address is determined by SDA0 to SDA11 at the rising edge of clock.

 

SDA[5]

L8

O

Column address is determined by SDA0-SDA9 and SDA11 at the rising

 

SDA[6]

L9

edge of the clock. SDA10 is used as an auto-precharge signal.

 

 

 

SDA[7]

L5

 

Note: All SDRAM operations are controlled entirely by the DS33Z41.

 

SDA[8]

M5

 

 

SDA[9]

M7

 

No user programming for SDRAM buffering is required.

 

SDA[10]

M8

 

 

 

SDA[11]

N8

 

 

 

 

 

 

SDRAM Bank Select. These 2 bits select 1 of 4 banks for the

 

SBA[0]

M6

I

read/write/precharge operations.

 

 

 

SBA[1]

N7

Note: All SDRAM operations are controlled entirely by the DS33Z41.

 

 

 

 

 

 

 

 

 

 

No user programming for SDRAM buffering is required.

 

 

K6

O

SDRAM Row Address Strobe. Active-low output, used to latch the row

 

SRAS

address on rising edge of SDCLKO. It is used with commands for Bank

 

 

 

 

Activate, Precharge, and Mode Register Write.

 

 

 

 

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Maxim DS33Z41 specifications Name PIN Type Function Sdram Controller