tmp19a61f10xbg TOSHIBA Semiconductor CORPORATION, tmp19a61f10xbg Datasheet - Page 525

• Manufacturer Part Number: tmp19a61f10xbg
• Description: 32-bit Tx System Risc Tx19 Family
• Manufacturer: TOSHIBA Semiconductor CORPORATION

TMP19A61
10) ID-Read
Using the ID-Read command, you can obtain the type and other information on the flash
memory contained in the device. The data to be loaded will be different depending on the
address [15:14] of the fourth and subsequent bus write cycles (any input data other than 0xF
can be used). On and after the fourth bus write cycle, when an LW command (to read an
arbitrary flash memory area) is executed after an SW command, the ID value will be loaded
(execute a SYNC command immediately after the LW command). Once the fourth bus write
cycle of an ID-Read command has passed, the device will not automatically return to the
read mode. In this condition, the set of the fourth bus write cycle and LW/SYNC commands
can be repetitively executed. For returning to the read mode, reset the system or use the
Read or Read/reset command.
(Important) The "interval between bus write cycles" between successive command
sequences must be 15 system clock cycles or longer irrespective of the operating frequency
used. This device doesn't have any function to automatically adjust the interval between bus
write cycles regarding execution of multiple SW commands to the flash memory. Therefore, if
an inadequate interval is used between two sets of bus write cycles, the flash memory cannot
be written as expected. Prior to setting the device to work in the onboard programming mode,
adjust the bus write cycle interval using a software timer, etc., to verify that the ID-Read
command can be successfully executed at the operating frequency of the application
program. In the onboard programming mode, use the bus write cycle interval at which the
ID-Read command can be operated normally to execute command sequences to rewrite the
flash memory.
TMP19A61 (rev1.0) 22-524