PDF AT43USB326 Data sheet ( Hoja de datos )

Número de pieza	AT43USB326
Descripción	Missed Watchdog Timer Reset
Fabricantes	ATMEL Corporation
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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. www.DataSheet4U.com 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

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