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SM5903CF

compression and non compression type anti-shock memory controller

Nippon Precision Circuits  

SM5903CF

Functional description

SM5903CF has two modes of operation; shock- The operating sequences are controlled using com-

proof mode and through mode.

mands from a microcontroller.

Microcontroller interface

Command format

Commands from the microcontroller are input using

3 bit serial inputs; data (YMDATA), bit clock

(YMCLK) and load signal (YMLD).

In the case of a read command from the microcon-

troller, bit serial data is output (ZSENSE) synchro-

nized to the bit clock input (YMCLK).

Write command format (Commands 80 to 85)

YMDATA

DATA 8bit

COMMAND 8bit

D7 D6 D5 D4 D3 D2 D1 D0 B7 B6 B5 B4 B3 B2 B1 B0

YMCLK

YMLD

Read command format (Commands 90, 91, 93)

YMDATA

COMMAND 8bit

B7 B6 B5 B4 B3 B2 B1 B0

YMCLK

YMLD

ZSENSE

STATUS 8bit

S7 S6 S5 S4 S3 S2 S1 S0

Read command format (Command 92 (memory residual read))

COMMAND 8bit

YMDATA

B7 B6 B5 B4 B3 B2 B1 B0

YMCLK

YMLD

ZSENSE

S7 S6

RESIDUAL DATA 16bit

S1 S0 M1 M2

M7 M8

NIPPON PRECISION CIRCUITS-11

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