ATMEGA16U2-16AU Atmel, ATMEGA16U2-16AU Datasheet - Page 12
ATMEGA16U2-16AU
Manufacturer Part Number
ATMEGA16U2-16AU
Description
8-bit Microcontrollers - MCU 16K Flash
Manufacturer
Atmel
Datasheet
1.ATMEGA16U2-16AU.pdf
(310 pages)
Specifications of ATMEGA16U2-16AU
Product Category
8-bit Microcontrollers - MCU
Rohs
yes
Core
AVR
Data Bus Width
8 bit
Program Memory Size
16 KB
Data Ram Size
1.25 KB
Data Rom Size
512 B
Program Memory Type
Flash
Factory Pack Quantity
1250
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6.6.1
6.7
7799D–AVR–11/10
Instruction Execution Timing
SPH and SPL – Stack Pointer High and Low Register
This section describes the general access timing concepts for instruction execution. The AVR
CPU is driven by the CPU clock clk
chip. No internal clock division is used.
Figure 6-4
vard architecture and the fast-access Register File concept. This is the basic pipelining concept
to obtain up to 1 MIPS per MHz with the corresponding unique results for functions per cost,
functions per clocks, and functions per power-unit.
Figure 6-4.
Figure 6-5
operation using two register operands is executed, and the result is stored back to the destina-
tion register.
Figure 6-5.
Bit
0x3E (0x5E)
0x3D (0x5D)
Read/Write
Initial Value
Register Operands Fetch
2nd Instruction Execute
3rd Instruction Execute
1st Instruction Execute
ALU Operation Execute
2nd Instruction Fetch
3rd Instruction Fetch
4th Instruction Fetch
1st Instruction Fetch
Total Execution Time
shows the internal timing concept for the Register File. In a single clock cycle an ALU
shows the parallel instruction fetches and instruction executions enabled by the Har-
Result Write Back
The Parallel Instruction Fetches and Instruction Executions
Single Cycle ALU Operation
15
SP15
SP7
7
R/W
R/W
0
1
clk
clk
CPU
CPU
14
SP14
SP6
6
R/W
R/W
0
1
13
SP13
SP5
5
R/W
R/W
1
1
CPU
T1
T1
, directly generated from the selected clock source for the
12
SP12
SP4
4
R/W
R/W
0
1
ATmega8U2/16U2/32U2
11
SP11
SP3
3
R/W
R/W
0
1
T2
T2
10
SP10
SP2
2
R/W
R/W
0
1
T3
T3
9
SP9
SP1
1
R/W
R/W
0
1
8
SP8
SP0
0
R/W
R/W
0
1
T4
T4
SPH
SPL
12
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