ISD5216PI datasheet(26/75 Pages) WINBOND

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ISD5216

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7.5.8. Playback Mode

The command sequence for an analog playback operation from a given address is the Slave Address

(80h), the Command Byte (A9h) for Play Analog @ Address, and the two address bytes. If The Play

Analog (A8h) is sent, playback starts from the current address pointer. The current address pointer is

returned when the three status bytes are read.

7.5.9. Record Mode

The command sequence for an Analog Record is a four byte sequence consisting of the Slave

Address (80h), the Command Byte (91h) for Record Analog @ Address, and the two address bytes. If

The Record Analog (90h) is sent, recording starts from the current address pointer.

7.5.10. Message Cueing

Message cueing allows the user to skip through messages, without having to know the actual physical

location of each message. This operation is used during playback. In this mode, the messages are

skipped 512 times faster than in normal playback mode. This operation will stop when an EOM marker

is reached. Then, the internal address counter will be pointing to the next message.

7.6. DIGITAL MODE

7.6.1. Writing Data

The Digital Write function allows the user to select a portion of the array to be used as digital memory.

The partition between analog and digital memory is left up to the user. A page can only be either

Digital or Analog, but not both. The minimum addressable block of memory in the digital mode is 1

block, or 64 bits, when reading or writing. The address sent to the device is the 11-bit row (or page)

address with the 5-bit scan (or block) address. However, one must send a Digital Erase before

attempting to change digital data on a page. This means that even when changing only one of the 32

blocks, all 32 will need to be rewritten to the page.

After the address is entered, the data is sent in one-byte packets followed by an I

2C acknowledge

generated by the chip. Data for each block is sent MSB first. The data transfer is ended when the

master generates an I

2C STOP condition. If only a partial block of data is sent before the STOP

condition, zero is “written” in the remaining bytes; that is, they are left at the erase level. An erased

page (row) will be read as all zeros. The device can buffer up to two blocks of data.

If the device is unable to accept more data due to the internal write process, the SCL line will be held

LOW indicating, to the master, to halt data transfer. If the device encounters an overflow condition, it

will respond by generating an interrupt condition and an I

2C Not Acknowledge signal after the last

valid byte of data. Once data transfer is terminated, the device needs up to two cycles (64 us) to

complete its internal write cycle before another command is sent. If an active command is sent before

the internal cycle is finished, the ISD5216 will hold SCL LOW until the current command is finished.

7.6.2. Reading Data

The Digital Read command utilizes the combined I

2C command format. That is, a command is sent to

the chip using the write data direction. Then the data direction is reversed by sending a repeated start

condition and the slave address with R/W set to one. After this, the slave device (ISD5216) begins to

send data to the master until the master generates a Not Acknowledge. If the part encounters an

overflow condition, the INT pin is pulled LOW. No other communication with the master is possible

due to the master generating ACK signals.

ISD5216PI Datasheet(PDF) 26 Page - Winbond

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