sm5907af Seiko NPC Corp., sm5907af Datasheet - Page 11

• Manufacturer Part Number: sm5907af
• Description: Compression And Non Compression Type Shock-proof Memory Controller
• Manufacturer: Seiko NPC Corp.

SM5907AF has two modes of operation; shock-
proof mode and through mode.
Microcontroller interface
Command format
Commands from the microcontroller are input using
3-wire serial interface inputs; data (YMDATA), bit
clock (YMCLK) and load signal (YMLD).
Functional description
Write command format (Commands 80 to 85)
Read command format (Commands 90, 91, 93)
Read command format (Command 92 (memory residual read))
YMDATA
YMDATA
YMDATA
YMCLK
ZSENSE
ZSENSE
YMCLK
YMCLK
YMLD
YMLD
YMLD
D7
B7
B7
D6
B6
B6
D5
B5
B5
COMMAND 8bit
COMMAND 8bit
DATA 8bit
D4
B4
B4
D3
B3
B3
D2
B2
B2
D1
B1
B1
SM5907AF
D0
B0
B0
B7
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).
The operating sequences are controlled using com-
mands from a microcontroller.
B6
S7
S7
B5
S6
S6
COMMAND 8bit
B4
S5
RESIDUAL DATA 16bit
B3
STATUS 8bit
S4
S1
NIPPON PRECISION CIRCUITS-11
B2
S3
S0
B1
M1 M2
S2
B0
S1
S0
M7
M8