AT91SAM9G45-CU-999 Atmel, AT91SAM9G45-CU-999 Datasheet - Page 1198

• Manufacturer Part Number: AT91SAM9G45-CU-999
• Description: IC MCU ARM9 APMC 324TFBGA
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91SAM9G45-CU-999

• Core Processor: ARM9
• Core Size: 16/32-Bit
• Speed: 400MHz
• Connectivity: EBI/EMI, Ethernet, I²C, IrDA, MMC, SPI, SSC, UART/USART, USB
• Peripherals: AC'97, DMA, I²S, LCD, POR, PWM, WDT
• Number Of I /o: 160
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: ROM
• Ram Size: 128K x 8
• Voltage - Supply (vcc/vdd): 0.9 V ~ 1.1 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 324-TFBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Supplier Unconfirmed

49.2.7
49.2.7.1
1198
AT91SAM9G45
USB High Speed Host Port (UHPHS) and Device Port (UDPHS)
USB does not start after power-up
The USB may not start properly at first use after power-up.
If the device boots out of the internal ROM, SAM-BA will not be functional.
Warning: When booting out of the internal ROM, this workaround is not implemented and there-
fore SAMBA will not be functional.
Below is a possible implementation of the workaround:
/* First enable the UTMI PLL */
AT91C_BASE_PMC->CKGR_UCKR |= (AT91C_CKGR_UCKR_PLLCOUNT & (0x3 << 20)) |
AT91C_CKGR_UCKR_UPLLEN;
tmp =0;
while (((AT91C_BASE_PMC->PMC_SR & AT91C_PMC_SR_LOCKU) == 0) && (tmp++ <
DELAY));
/* Disable the PLLUTMI and wait 10μs min*/
AT91C_BASE_PMC->CKGR_UCKR &= ~AT91C_CKGR_UCKR_UPLLEN;
tmp = 0;
while(tmp++ < DELAY2); // DELAY2 must be defined to fit the 10μs min;
1. Apply a hardware reset (NRST) after power-up.
2. Activate the PLLUTMI twice, following the procedure below:
Problem/Fix Workaround
– a- Start The UTMI PLL an wait for the PLL lock bit
– b- Disable the UTMI PLL and wait 10 μseconds minimum
– c- Restart the UTMIPLL and wait for the PLL Lock bit
6438F–ATARM–21-Jun-10