AT94K40AL-25BQC Atmel, AT94K40AL-25BQC Datasheet - Page 50
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AT94K40AL-25BQC
Manufacturer Part Number
AT94K40AL-25BQC
Description
IC FPSLIC 40K GATE 25MHZ 144LQFP
Manufacturer
Atmel
Series
FPSLIC®r
Specifications of AT94K40AL-25BQC
Core Type
8-bit AVR
Speed
18MHz
Interface
I²C, UART
Program Sram Bytes
20K-32K
Fpga Sram
18kb
Data Sram Bytes
4K ~ 16K
Fpga Core Cells
2304
Fpga Gates
40K
Fpga Registers
2862
Voltage - Supply
3 V ~ 3.6 V
Mounting Type
Surface Mount
Operating Temperature
0°C ~ 70°C
Package / Case
144-LQFP
For Use With
ATSTK594 - BOARD FPSLIC DAUGHTER FOR STK500
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
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AT94KAL Series FPSLIC
Figure 4-9.
For single-cycle access (In/Out Commands) to I/O, the instruction has to be less than 16 bits:
In the data SRAM, the registers are located at memory addresses $00 - $1F and the I/O space is
located at memory addresses $20 - $5F.
As there are only 6 bits available to refer to the I/O space, the address is re-mapped down 2 bits.
This means the In/Out commands access $00 to $3F which goes directly to the I/O and maps to
$20 to $5F in SRAM. All other instructions access the I/O space through the $20 - $5F
addressing.
For compatibility with future devices, reserved bits should be written zero if accessed. Reserved
I/O memory addresses should never be written.
The status flags are cleared by writing a logic 1 to them. Note that the CBI and SBI instructions
will operate on all bits in the I/O register, writing a one back into any flag read as set, thus clear-
ing the flag. The CBI and SBI instructions work with registers $00 to $1F only.
$00
$3F
Memory-mapped I/O
opcode
5 bits
Used for In/Out
Instructions
I/O Space
register
r0 - 31 ($1F)
5 bits
Registers r0 - r31
Other Instructions
Memory-mapped
SRAM Space
Used for all
I/O
address
r0 - 63 ($3F)
6 bits
$5F
$1F
$00
1138I–FPSLI–1/08
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