ml2500b Oki Optical Components, ml2500b Datasheet - Page 9

• Manufacturer Part Number: ml2500b
• Description: Analog-storage Single-chip Record/playback With Bit-cell Flash Memory
• Manufacturer: Oki Optical Components

Operational Timing at Power-On
To initialize the internal serial interface circuit of ML2500B after power-on, you must input “L” pulse to the
RESET pin at the timing shown below. After this “L” pulse input, the ML2500B enters into standby state
(Command-wait state).
Timing for inputting RESET pulse at Power-on
RESET(I)
Timing for Power Up and Power Down Operations
ML2500B stops its oscillation circuit to shift to power-down state either by using the PDWN command or by
inputting Low level to the RESET pin. In power-down state, the ML2500B turns into low power consumption
mode.
Two options are available to power up the LSI again after power down by the PDWN command:
1. Input “L” pulse to the RESET pin, or
2. Input Low level to the CS pin.
The following charts show timings for power up and power down operations.
Timing for power-down operation by using the PDWN command
OKI Semiconductor
RESET(I)
Status
Status
CS(I)
V
CS
DD
Command-wait
100 µs
t
PDWN
PDWN command input
2.7 V
Resetting
1 µs
t
RST
Power Down
Powering Up
t
PWUP
1 ms
t
1 µs
1 µs
CSWL
t
RST
Standby (Command-wait)
Powering Up
Power up with CS pin
Power up with RESET pin
t
PWUP
1 ms
Command-wait
FEDL2500BFULL-02
PDWN command input
Power Down
ML2500BTA
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