SM5902AF Datasheet, PDF (12/40 Pages) Nippon Precision Circuits Inc – compression and non compression type shock-proof memory controller

SM5902AF
Functional description
SM5902AF has two modes of operation; shock- The operating sequences are controlled using com-
proof mode and through mode.
mands from a microcontroller.
Microcontroller interface
Commands from the microcontroller are input using
3-wire serial interface 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 86)
YMDATA
DATA 8bit
COMMAND 8bit
D7 D6 D5 D4 D3 D2 D1 D0 B7 B6 B5 B4 B3 B2 B1 B0
YMCLK
YMLD
Write command format (Commands 87)
YMDATA
D11 D10
DATA 12bit
COMMAND 8bit
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))
YMDATA
COMMAND 8bit
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-12