at94k05al-25aqi ATMEL Corporation, at94k05al-25aqi Datasheet - Page 25
at94k05al-25aqi
Manufacturer Part Number
at94k05al-25aqi
Description
5k - 40k Gates Of At40k Fpga With 8-bit Microcontroller, Up To 36k Bytes Of Sram And On-chip Jtag Ice
Manufacturer
ATMEL Corporation
Datasheet
1.AT94K05AL-25AQI.pdf
(192 pages)
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A Side
Rev. 1138F–FPSLI–06/02
The A side is partitioned into Program memory and Data memory:
•
•
•
•
Table 4. AVR Program Decode for SRAM 2:7 (16K16)
•
•
•
•
Program memory is 16-bit words.
Program memory address $0000 always starts in the highest two SRAMs (n - 1, n)
[SRAMn - 1 (low byte) and SRAMn (high byte)] (SRAM labels are for layout, the
addressing scheme is transparent to the AVR PC).
System configuration determines the higher addresses for program memory:
– SCR bits 41 = 0 : 40 = 0, program memory extended from $2800 - $3FFF
– SCR bits 41 = 0 : 40 = 1, program memory extended from $2800 - $37FF
– SCR bits 41 = 1 : 40 = 0, program memory extended from $2800 - $2FFF
– SCR bits 41 = 1 : 40 = 1, no extra program memory
Extended program memory is always lost to extended data memory from SRAM2/3 down
to SRAM6/7, see Table 4.
Data memory is 8-bit words.
Data memory address $0000 always starts in SRAM0 (SRAM labels are for layout, the
addressing scheme is transparent to AVR data read/write).
System configuration determines the higher address for data memory:
–
–
–
–
Extended data memory is always lost to extended program memory from SRAM7 up to
SRAM2 in 2 x SRAM blocks, see Table 5.
Address Range
SCR bits 41 = 0 : 40 = 0, no extra data memory
SCR bits 41 = 0 : 40 = 1, data memory extended from $1000 - $1FFF
SCR bits 41 = 1 : 40 = 0, data memory extended from $1000 - $2FFF
SCR bits 41 = 1 : 40 = 1, data memory extended from $1000 - $3FFF
$3FFF - $3800
$3FFF - $3800
$37FF - $3000
$37FF - $3000
$2FFF - $2800
$2FFF - $2800
$27FF - $2000
$27FF - $2000
$1FFF - $1800
$1FFF - $1800
$17FF - $1000
$17FF - $1000
$0FFF - $0800
$0FFF - $0800
$07FF - $0000
$07FF - $0000
SRAM
n = 17
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
AT94K Series FPSLIC
Comments
CR41:40 = 00
CR41:40 = 00,01
CR41:40 = 00,01,10
AVR Program Read-only
AVR Program Read-only
AVR Program Read-only
AVR Program Read-only
AVR Program Read-only
AVR Program Read-only
AVR Program Read-only
AVR Program Read-only
AVR Program Read-only
AVR Program Read-only
25
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