 |
Datenblatt-Suchmaschine für elektronische Bauteile |
|
|
Datenblatt-Suchmaschine für elektronische Bauteile |
|
AM29PDL128G70R Datenblatt(PDF) 11 Page - SPANSION |
|
||||||||||||||||||||||||||||||
AM29PDL128G70R Datenblatt(HTML) 11 Page - SPANSION |
|
|
11 / 69 page  10 Am29PDL128G July 29, 2002 P R E L I M I NARY DEVICE BUS OPERATIONS This section describes the requirements and use of the device bus operations, which are initiated through the internal command register. The command register itself does not occupy any addressable memory loca- tion. The register is a latch used to store the com- mands, along with the address and data information needed to execute the command. The contents of the register serve as inputs to the internal state machine. The state machine outputs dictate the function of the device. Table 1 lists the device bus operations, the in- puts and control levels they require, and the resulting output. The following subsections describe each of these operations in further detail. Table 1. Am29PDL128G Device Bus Operations Legend: L = Logic Low = V IL, H = Logic High = VIH, VID = 11.5–12.5 V, VHH = 9.0 ± 0.5 V, X = Don’t Care, SA = Sector Address, A IN = Address In, DIN = Data In, DOUT = Data Out Notes: 1. Addresses are A21–A0 in double word mode (WORD# = V IH), A21–A-1 in word mode (WORD# = VIL). 2. The sector protect and sector unprotect functions may also be implemented via programming equipment. See the “Sector Protection” section. Word/Double Word Configuration The WORD# pin controls whether the device data I/O pins operate in the word or double word configuration. If the WORD# pin is set at V IH, the device is in double word configuration, DQ31–DQ0 are active and con- trolled by CE# and OE#. If the WORD# pin is set at V IL, the device is in word configuration, and only data I/O pins DQ15–DQ0 are active and controlled by CE# and OE#. The data I/O pins DQ30–DQ16 are tri-stated, and the DQ31 pin is used as an input for the least significant address bit (LSB) function, which is named A-1. Requirements for Reading Array Data To read array data from the outputs, the system must drive the CE# and OE# pins to V IL. CE# is the power control and selects the device. OE# is the output con- trol and gates array data to the output pins. WE# should remain at V IH. The WORD# pin determines whether the device outputs array data in words or dou- ble words. The internal state machine is set for reading array data upon device power-up, or after a hardware reset. This ensures that no spurious alteration of the memory content occurs during the power transition. No com- mand is necessary in this mode to obtain array data. Standard microprocessor read cycles that assert valid addresses on the device address inputs produce valid data on the device data outputs. Each bank remains enabled for read access until the command register contents are altered. Refer to the AC Read-Only Operations table for timing specifications and to Figure 11 for the timing diagram. I CC1 in the DC Characteristics table represents the ac- tive current specification for reading array data. Random Read (Non-Page Read) Address access time (t ACC) is equal to the delay from stable addresses to valid output data. The chip enable access time (t CE ) is the delay from the stable ad- dresses and stable CE# to valid data at the output in- puts. The output enable access time is the delay from the falling edge of the OE# to valid data at the output Operation CE# OE# WE# RESET# WP# Addresses (Note 1) DQ31–DQ16 DQ15– DQ0 WORD# = V IH WORD# = V IL Read L L H H X AIN DOUT DQ30–DQ16 = High-Z, DQ31 = A-1 DOUT Write L H L H X A IN D IN D IN Standby VCC ± 0.3 V XX VCC ± 0.3 V X X High-Z High-Z High-Z Output Disable L H H H X X High-Z High-Z High-Z Reset X X X L X X High-Z High-Z High-Z Temporary Sector Unprotect (High Voltage) XX X VID XAIN DIN XDIN |
Ähnliche Teilenummer - AM29PDL128G70R |
|
Ähnliche Beschreibung - AM29PDL128G70R |
|
|
Link URL |
| Privatsphäre und Datenschutz |
| ALLDATASHEETDE.COM |
| War ALLDATASHEET hilfreich? [ DONATE ] |
Über Alldatasheet | Werbung | Kontakt | Privatsphäre und Datenschutz | Linktausch | Hersteller All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
German ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
