M93S46 ST Microelectronics, M93S46 Datasheet - Page 9

• Manufacturer Part Number: M93S46
• Description: 4Kbit / 2Kbit and 1Kbit 16-bit wide MICROWIRE Serial Access EEPROM with Block Protection
• Manufacturer: ST Microelectronics

be started, and the addressed location will not be
programmed.
While the M93Sx6 is performing a write cycle, but
after a delay (t
becomes available, Chip Select Input (S) can be
driven High to monitor the status of the write cycle:
Serial Data Output (Q) is driven Low while the
M93Sx6 is still busy, and High when the cycle is
complete, and the M93Sx6 is ready to receive a
new instruction. The M93Sx6 ignores any data on
the bus while it is busy on a write cycle. Once the
M93Sx6 is Ready, Serial Data Output (Q) is driven
High, and remains in this state until a new start bit
is decoded or the Chip Select Input (S) is brought
Low.
Programming is internally self-timed, so the exter-
nal Serial Clock (C) may be disconnected or left
running after the start of a write cycle.
Write All
The Write All Memory with same Data (WRAL) in-
struction is valid only after the Protection Register
has been cleared by executing a Protection Reg-
ister Clear (PRCLEAR) instruction. The Write All
Memory with same Data (WRAL) instruction si-
multaneously writes the whole memory with the
same data word given in the instruction.
SLSH
) before the status information
Write Enable (W) must be held High before and
during the instruction. Input address and data, on
Serial Data Input (D) are sampled on the rising
edge of Serial Clock (C).
After the last data bit has been sampled, the Chip
Select Input (S) must be taken Low before the next
rising edge of Serial Clock (C). If Chip Select Input
(S) is brought Low before or after this specific time
frame, the self-timed programming cycle will not
be started, and the addressed location will not be
programmed.
While the M93Sx6 is performing a write cycle, but
after a delay (t
becomes available, Chip Select Input (S) can be
driven High to monitor the status of the write cycle:
Serial Data Output (Q) is driven Low while the
M93Sx6 is still busy, and High when the cycle is
complete, and the M93Sx6 is ready to receive a
new instruction. The M93Sx6 ignores any data on
the bus while it is busy on a write cycle. Once the
M93Sx6 is Ready, Serial Data Output (Q) is driven
High, and remains in this state until a new start bit
is decoded or the Chip Select Input (S) is brought
Low.
Programming is internally self-timed, so the exter-
nal Serial Clock (C) may be disconnected or left
running after the start of a write cycle.
SLSH
M93S66, M93S56, M93S46
) before the status information
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