MBM29PL160BD データシートの表示（PDF） - Fujitsu
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コンポーネント説明
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MBM29PL160BD Datasheet PDF : 51 Pages
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MBM29PL160TD-75/-90/MBM29PL160BD-75/-90
Autoselect
The Autoselect mode allows the reading out of a binary code from the device and will identify its manufacturer
and type. The intent is to allow programming equipment to automatically match the device to be programmed
with its corresponding programming algorithm. The Autoselect command may also be used to check the status
of write-protected sectors. (See Tables 4.1 and 4.2.) This mode is functional over the entire temperature range
of the device.
To activate this mode, the programming equipment must force VID (11.5 V to 12.5 V) on address pin A9. Two
identifier bytes may then be sequenced from the devices outputs by toggling address A0 from VIL to VIH. All
addresses are DON’T CARES except A0, A1, and A6 (A-1). (See Table 2 or Table 3.) (Recomend to set VIL for
the other addresses pins.)
The manufacturer and device codes may also be read via the command register, for instances when the
MBM29PL160TD/BD is erased or programmed in a system without access to high voltage on the A9 pin. The
command sequence is illustrated in Table 7, Command Definitions.
Word 0 (A0 = VIL) represents the manufacture’s code and word 1 (A0 = VIH) represents the device identifier code.
For the MBM29PL160TD/BD these two bytes are given in the Table 4.2. All identifiers for manufactures and
device will exhibit odd parity with DQ7 defined as the parity bit. In order to read the proper device codes when
executing the Autoselect, A1 must be VIL. (See Tables 2 or 3.)
If BYTE = VIL (for byte mode), the device code is 27H (for top boot block) or 45H (for bottom boot block). If BYTE
= VIH (for word mode), the device code is 2227H (for top boot block) or 2245H (for bottom boot block).
In order to determine which sectors are write protected, A1 must be at VIH while running through the sector
addresses; if the selected sector is protected, a logical ‘1’ will be output on DQ0 (DQ0 =1).
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