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Número de pieza | AT43USB326 | |
Descripción | Missed Watchdog Timer Reset | |
Fabricantes | ATMEL Corporation | |
Logotipo | ||
Hay una vista previa y un enlace de descarga de AT43USB326 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
No Preview Available ! Features
• AVR® 8-bit RISC Microcontroller with 83 ns Instruction Cycle Time
• USB Hub with One Attached and Two External Ports
• USB Keyboard Function with Three Programmable Endpoints
• 16 KB Program Memory, 512 Bytes Data SRAM
• 32 x 8 General-purpose Working Registers
• 32 Programmable I/O Port Pins
• Support for 18 x 8 Keyboard Matrix
• Keyboard Scan Inputs with Pull-up Resistor
• Four LED Driver Outputs
• One 8-bit Timer/Counter with Separate Pre-scaler
• External and Internal Interrupt Sources
• Programmable Watchdog Timer
• 6 MHz Oscillator with On-chip PLL
• 5V Operation with On-chip 3.3V Power Supply
• 48-lead LQFP Package
Description
The Atmel AT43USB326 is an 8-bit microcontroller based on the AVR RISC architec-
ture. By executing powerful instructions in a single clock cycle, the AT43USB326
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.
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Furthermore, the AT43USB326 features an on-chip 16-Kbyte program memory and
512 bytes of data memory. It is supported by a standard set of peripherals such as
timer/counter modules, watchdog timer and internal and external interrupt sources.
The major peripheral included in the AT43USB326 is the USB Hub with an embedded
keyboard controller function.
Multimedia
USB Keyboard
Controller with
Embedded Hub
AT43USB326
3313D–USB–04/06
1
1 page AT43USB326
Figure 2. The AT43USB326 Enhanced RISC Architecture with USB Keyboard Controller and Hub
8 x 16
Program
Memory
Instruction
Register
Instruction
Decoder
Control
Lines
Program
Counter
Status and
Control
32 x 8
General-purpose
Registers
ALU
512 x 8
SRAM
Interrupt
Unit
8-bit
Timer/Counter
Watchdog
Timer
18 Strobe Outputs
8 Strobe Inputs
2 GPIO
Lines
USB
Hub and
Function
4 LED Drives
3313D–USB–04/06
5
5 Page 3313D–USB–04/06
AT43USB326
Table 3. USB Hub and Function Registers
Address
Name
Function
$1FFD
FRM_NUM_H
Frame Number High Register
$1FFC
FRM_NUM_L
Frame Number Low Register
$1FFB
GLB_STATE
Global State Register
$1FFA
SPRSR
Suspend/Resume Register
$1FF9
SPRSIE
Suspend/Resume Interrupt Enable Register
$1FF8
SPRSMSK
Suspend/Resume Interrupt Mask Register
$1FF7
UISR
USB Interrupt Status Register
$1FF6
UIMSKR
USB Interrupt Mask Register
$1FF5
UIAR
USB Interrupt Acknowledge Register
$1FF3
UIER
USB Interrupt Enable Register
$1FF2
UOVCER
Overcurrent Detect Register
$1FEF
HADDR
Hub Address Register
$1FEE
FADDR
Function Address Register
$1FE7
HENDP0_CNTR
Hub Endpoint 0 Control Register
$1FE5
FENDP0_CNTR
Function Endpoint 0 Control Register
$1FE4
FENDP1_CNTR
Function Endpoint 1 Control Register
$1FE3
FENDP2_CNTR
Function Endpoint 2 Control Register
$1FDF
HCSR0
Hub Controller Endpoint 0 Service Routine Register
$1FDD
FCSR0
Function Controller Endpoint 0 Service Routine Register
$1FDC
FCSR1
Function Controller Endpoint 1 Service Routine Register
$1FDB
FCSR2
Function Controller Endpoint 2 Service Routine Register
$1FD7
HDR0
Hub Endpoint 0 FIFO Data Register
$1FD5
FDR0
Function Endpoint 0 FIFO Data Register
$1FD4
FDR1
Function Endpoint 1 FIFO Data Register
$1FD3
FDR2
Function Endpoint 2 FIFO Data Register
$1FCF
HBYTE_CNT0
Hub Endpoint 0 Byte Count Register
$1FCD
FBYTE_CNT0
Function Endpoint 0 Byte Count Register
$1FCC
FBYTE_CNT1
Function Endpoint 1 Byte Count Register
$1FCB
FBYTE_CNT2
Function Endpoint 2 Byte Count Register
$1FC7
HSTR
Hub Status Register
$1FC5
HPCON
Hub Port Control Register
$1FBA
HPSTAT3
Hub Port 3 Status Register
$1FB9
HPSTAT2
Hub Port 2 Status Register
$1FB8
HPSTAT1
Hub Port 1 Status Register
$1FB2
HPSCR3
Hub Port 3 Status Change Register
11
11 Page |
Páginas | Total 30 Páginas | |
PDF Descargar | [ Datasheet AT43USB326.PDF ] |
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