TMP92FD54AI datasheet(45/84 Pages) TOSHIBA

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2006-01-27

92FD54AI-45

TMP92FD54AI

4) Auto Chip Erase & UnProtect command (See Table 4.3.47.)

1. The transmitted/received data in the first and second bytes are the same as

for the RAM Transfer command.

2. The data received in the third byte is the operation command data. In this

case it is Auto Chip Erase & UnProtect command data (40H).

3. The data in the fourth byte is the ACK response data returned by the device

for the operation command data in the third byte. The first, the device checks

if the received data in the third byte contains an error. If a Receive error is

found, the device returns the ACK response data for, Communication error

(bit 3) X8H and waits for the next operation command (third byte). The four

high-order bits of the returned ACK response data are undefined. (They are

the four high-order bits of the immediately preceding operation command

data.)

Next, if the data received in the third byte corresponds to one of the operation

command values given in Table 4.3.2, the device echoes back the received data

(the ACK response data for normal reception). In this case the data value 40H

is echoed back and the program branches to the Auto Chip Erase & UnProtect

processing routine. If the received data does not correspond to any operation

command the device returns the ACK response data for an Operation

Command error (bit 0) X1H and waits for the next operation command (third

byte). The four high-order bits of the returned ACK response data are

undefined. (They are the four high-order bits of the immediately preceding

operation command data.)

4. The data in the fifth bytes sent by the device indicates whether collective

erase has terminated normally. When collective erase has terminated

normally, the device returns collective erase terminated normally code (4FH).

If an erase error occurs, the device returns erase error code (4CH).

5. The data in the sixth bytes sent by the device are ACK response data. When

collective erase has terminated normally, the device returns collective erase

ACK response code (B1H).

If an erase error occurs, the device returns erase error ACK response code

(B4H).

6. The data received as the seventh byte is the data value for the next operation

command.

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