Datasheet

MB85RS64V
2 DS501-00015-4v0-E
■ PIN ASSIGNMENT
■ PIN FUNCTIONAL DESCRIPTIONS
Pin No. Pin Name Functional description
1CS
Chip Select pin
This is an input pin to make chip select. When CS
is the “H” level, device is in deselect
(standby) status and SO becomes High-Z. Inputs from other pins are ignored at this time.
When CS
is the “L” level, device is in select (active) status. CS has to be the “L” level
before inputting op-code. The Chip Select pin is pulled up internally to the VDD pin.
3WP
Write Protect pin
This is a pin to control writing to a status register. The writing of status register (see “■
STATUS REGISTER”) is protected in related with WP
and WPEN. See “■WRITING
PROTECT” for detail.
7HOLD
Hold pin
This pin is used to interrupt serial input/output without making chip deselect. When
HOLD
is the “L” level, hold operation is activated, SO becomes High-Z, and SCK and SI
become don’t care. While the hold operation, CS
shall be retained the “L” level.
6SCK
Serial Clock pin
This is a clock input pin to input/output serial data. SI is loaded synchronously to a rising
edge, SO is output synchronously to a falling edge.
5SI
Serial Data Input pin
This is an input pin of serial data. This inputs op-code, address, and writing data.
2SO
Serial Data Output pin
This is an output pin of serial data. Reading data of FRAM memory cell array and status
register are output. This is High-Z during standby.
8 VDD Supply Voltage pin
4 GND Ground pin
GND SI
SO
VDD
SCK
WP
CS
HOLD
8
7
6
54
3
2
1
(TOP VIEW)
(FPT-8P-M02)