at49bv008a ATMEL Corporation, at49bv008a Datasheet - Page 3

• Manufacturer Part Number: at49bv008a
• Description: 8-megabit 1m X 8/ 512k X 16 Flash Memory
• Manufacturer: ATMEL Corporation

AT49BV/LV008A(T) Block Diagram
AT49BV/LV8192A(T) Block Diagram
1049K–FLASH–11/02
ADDRESS
ADDRESS
INPUTS
INPUTS
RESET
RESET
GND
GND
VCC
VCC
VPP
VPP
WE
WE
OE
CE
OE
CE
Y DECODER
Y DECODER
changed when input levels of 5.5 volts or less are used. The boot sector is designed to
contain user secure code.
For the AT49BV/LV8192A(T), the BYTE pin controls whether the device data I/O pins
operate in the byte or word configuration. If the BYTE pin is set at a logic “1” or left open,
the device is in word configuration, I/O0 - I/O15 are active and controlled by CE and OE.
If the BYTE pin is set at logic “0”, the device is in byte configuration, and only data I/O
pins I/O0 - I/O7 are active and controlled by CE and OE. The data I/O pins I/O8 - I/O14
are tri-stated and the I/O15 pin is used as an input for the LSB (A-1) address function.
X DECODER
X DECODER
CONTROL
CONTROL
LOGIC
LOGIC
DATA INPUTS/OUTPUTS
DATA INPUTS/OUTPUTS
PROGRAM DATA
PROGRAM DATA
INPUT/OUTPUT
INPUT/OUTPUT
MAIN MEMORY
MAIN MEMORY
(496K WORDS)
(992K BYTES)
PARAMETER
PARAMETER
PARAMETER
PARAMETER
BOOT BLOCK
BOOT BLOCK
I/O0 - I/O15
AT49BV/LV8192A
4K WORDS
4K WORDS
I/O0 - I/O7
8K BYTES
AT49BV/LV008A
BUFFERS
LATCHES
Y-GATING
8K BYTES
16K BYTES
BUFFERS
LATCHES
Y-GATING
8K WORDS
BLOCK 2
BLOCK 1
BLOCK 2
BLOCK 1
AT49BV/LV008A(T)/8192A(T)
FFFFF
07FFF
05FFF
03FFF
00000
7FFFF
03FFF
02FFF
01FFF
00000
08000
06000
04000
04000
03000
02000
DATA INPUTS/OUTPUTS
DATA INPUTS/OUTPUTS
PROGRAM DATA
PROGRAM DATA
INPUT/OUTPUT
INPUT/OUTPUT
MAIN MEMORY
MAIN MEMORY
(496K WORDS)
BOOT BLOCK
BOOT BLOCK
PARAMETER
PARAMETER
I/O0 - I/O15
PARAMETER
PARAMETER
(992K BYTES)
I/O0 - I/O7
4K WORDS
4K WORDS
16K BYTES
AT49BV/LV8192AT
8K WORDS
Y-GATING
8K BYTES
8K BYTES
Y-GATING
BUFFERS
LATCHES
BUFFERS
LATCHES
AT49BV/LV008AT
BLOCK 1
BLOCK 2
BLOCK 1
BLOCK 2
FFFFF
FBFFF
F9FFF
7FFFF
7DFFF
7CFFF
7BFFF
FC000
FA000
F7FFF
00000
7E000
7D000
7C000
00000
F8000
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