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AT43USB320A 데이터시트 PDF




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AT43USB320A 데이터시트, 핀배열, 회로
Features
AVR® 8-bit RISC Microcontroller with 83 ns Instruction Cycle Time
USB Hub with One Attached and Four External Ports
USB Function with Two Programmable Endpoints
External Program Memory, 512-byte Data SRAM
32 x 8 General Purpose Working Registers
32 Programmable I/O Port Pins
Programmable Serial UART
Master/Slave SPI Serial Interface
One 8-bit Timer/Counter with Separate Pre-scaler
One 16-bit Timer/Counter with Separate Pre-scaler and Two PWMs
External and Internal Interrupt Sources
Programmable Watchdog Timer
6 MHz Oscillator with On-chip PLL
5V Operation with On-chip 3.3V Power Supply
100-lead LQFP Package
Description
The Atmel AT43USB320A is an 8-bit microcontroller based on the AVR RISC architec-
ture. By executing powerful instructions in a single clock cycle, the AT43USB320A
achieves throughputs approaching 12 MIPS. The AVR core combines a rich instruc-
tion set with 32 general-purpose working registers. All 32 registers are directly
connected to the ALU allowing two independent registers to be accessed in one single
instruction executed in one clock cycle. The resulting architecture is more code effi-
cient while achieving throughputs up to ten times faster than conventional CISC
microcontrollers.
The AT43USB320A features an on-chip 512-byte of datwawwm.DaetaSmheoet4rUy.c.omIt is supported by a
standard set of peripherals such as timer/counter modules, watchdog timer and inter-
nal and external interrupt sources. The major peripheral included in the
AT43USB320A is the USB Hub with an embedded function for use in peripherals such
as monitor with remote control as shown in Figure 1.
Note:
There are two versions of the AT43USB320A. They are indicated by the internal part
numbers 55618D and 55618E. The only difference between the two versions is in the
polarity of the SUSPEND pin. The 55618D SUSPEND pin is active low, while the
55618E SUSPEND pin is active high.
Full-speed USB
Microcontroller
with an
Embedded Hub
AT43USB320A
Rev. 1443E–USB–4/04
1




AT43USB320A pdf, 반도체, 판매, 대치품
Pin Number
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
Signal
CEXT2
DP2
DM2
DP3
DM3
DP4
DM4
PA0
PA1
PA2
PA3
PA4
VSS
NC
PA5
PA6
PA7
PB0
PB1
Type
O
B
B
B
B
B
B
B
B
B
B
B
V
B
B
B
B
B
Pin Number
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
Signal
PB2
PB3
VSS
PB4
PB5
PB6
PB7
PC0
PC1
PC2
PC3
PC4
PC5
PC6
PC7
PD0
PD1
VSS
NC
Type
B
B
V
B
B
B
B
B
B
B
B
B
B
B
B
B
B
V
4 AT43USB320A
1443E–USB–4/04

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AT43USB320A 전자부품, 판매, 대치품
Architectural
Overview
1443E–USB–4/04
AT43USB320A
The peripherals and features of the AT43USB320A microcontroller are similar to those of the
AT90S8515, with the exception of the following modifications:
• External Program Memory
• No EEPROM
• No external data memory accesses
• No Analog Comparation
• Idle mode not supported
• USB Hub with attached function
• No internal pull-ups in the general-purpose I/O pin PA, PB, PC, PD
The embedded USB hardware of the AT43USB320A is a compound device, consisting of a 5
port hub with a permanently attached function on one port. The hub and attached function are
two independent USB devices, each having its own device addresses and control endpoints.
The hub has its dedicated interrupt endpoint, while the USB function has 2 additional program-
mable endpoints with separate 8-byte FIFOs.
The microcontroller always runs from a 12 MHz clock that is generated by the USB hardware.
While the nominal and average period of this clock is 83.3 ns, it may have single cycles that
deviate by ±20.8 ns during a phase adjustment by the SIE's clock/data separator of the USB
hardware.
The microcontroller shares most of the control and status registers of the megaAVRMicro-
controller Family. The registers for managing the USB operations are mapped into its SRAM
space. The I/O section on page 16 summarizes the available I/O registers. The “AVR Register
Set” on page 36 covers the AVR registers. Please refer to the Atmel AVR manual for more
information.
The fast-access register file concept contains 32 x 8-bit general-purpose working registers
with a single clock cycle access time. This means that during one single clock cycle, one Arith-
metic Logic Unit (ALU) operation is executed. Two operands are output from the register file,
the operation is executed, and the result is stored back in the register file – in one clock cycle.
Six of the 32 registers can be used as three 16-bit indirect address register pointers for Data
Space addressing - enabling efficient address calculations. One of the three address pointers
is also used as the address pointer for look-up tables in program memory. These added func-
tion registers are the 16-bit X-, Y- and Z-registers.
The ALU supports arithmetic and logic operations between registers or between a constant
and a register. Single register operations are also executed in the ALU. Figure 2 on page 6
shows the AT43USB320A AVR Enhanced RISC microcontroller architecture.
In addition to the register operation, the conventional memory addressing modes can be used
on the register file as well. This is enabled by the fact that the register file is assigned the 32
lowest Data Space addresses ($00 - $1 F), allowing them to be accessed as though they were
ordinary memory locations.
The I/O memory space contains 64 addresses for CPU peripheral functions as Control Regis-
ters, Timer/Counters, and other I/O functions. The I/O Memory can be accessed directly, or as
the Data Space locations following those of the register file, $20 - $5F.
The AVR uses a Harvard architecture concept – with separate memories and buses for pro-
gram and data. The program memory is executed with a single-level pipelining. While one
instruction is being executed, the next instruction is pre-fetched from the program memory.
This concept enables instructions to be executed in every clock cycle. The program memory is
a downloadable SRAM or a mask programmed ROM.
With the relative jump and call instructions, the whole 24K address space is directly accessed.
Most AVR instructions have a single 16-bit word format. Every program memory address con-
tains a 16- or 32-bit instruction.
7

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부품번호상세설명 및 기능제조사
AT43USB320A

Missed Watchdog Timer Reset

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