at91sam9g20-cu ATMEL Corporation, at91sam9g20-cu Datasheet - Page 803

• Manufacturer Part Number: at91sam9g20-cu
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

Revision History
6384B–ATARM–15-Dec-08
Doc. Rev
6384B
Comments
Overview
“Features” on page
Section 10.4.3
Section 8.1.1.1 “BMS = 1, Boot on Embedded
– SDCard,
Signal Description,
Section 6.6 “Shutdown Logic
AT91SAM9G20 Boot Program
Section 13.3 “Device
“Enable the user reset” removed from initialization steps.
Section 13.8 “SDCard Boot”
Section 13.11 “Hardware and Software Constraints”
capacity SDCards.”
DBGU
Section 28.1
purpose serial communication.”
PMC
Section 26.9.11 “PMC Master Clock
Processor Clock replaced Master Clock in description.
Electrical Characteristics:
Section 41.8 “Core Power Supply POR
“VDDCORE and VDDIO Constraints at Startup”
41.11.2 “SPI”
Figure 41-7. “SPI Master Mode with (CPOL = 0 and NCPHA = 1) or (CPOL =1 and NCPHA = 0)”
Figure 41-8. “SPI Master Mode with (CPOL = NCPHA = 0) or (CPOL and NCPHA = 1)”
Figure 41-9. “SPI Slave Mode with (CPOL = 0 and NCPHA = 1) or (CPOL = 1 and NCPHA = 0)”
Figure 41-10. “SPI Slave Mode with (CPOL = NCPHA = 0) or (CPOL = NCPHA = 1)”
Table 41-4, “Power Consumption by Peripheral in Active Mode,”
Table 41-15, “PLLA Characteristics,”
Table 41-3, “Power Consumption for Different Modes,”
Errata:
Section 44.2.4 “Static Memory Controller
Section 44.2.4.1 “SMC: Chip Select Parameters Modification”
(boot ROM does not support high capacity SDCards) clarification added.
“Overview”, added text: “The Debug Unit two-pin UART can be used stand-alone for general
Timings: The titles of the figures listed below have been updated.
“USART”, “Optional Manchester Encoding” added to list of USART features.
Table
1, Debug Unit (DBGU) updated.
Initialization”, updated
3-1, added GNDPLL to table.
added (high capactiy SDCards not support by boot ROM)
Pins”, updated with external pull-up requirement.
Register”: bitfiedld description for
I
PLL
Characteristics”, updated with caution on power-up,
active mode, current consumption is 8 mA.
(SMC)”, added to datasheet with the errata listed below:
ROM”,
updated, and Board Schematics added to section.
added footnote
Active mode, “all peripheral clocks de-activated”.
AT91SAM9G20 Preliminary
updatedvalues in Consumption column.
(1)
“PDIV: Processor Clock
“Boot ROM does not support high
Figure 41-2.
Division”,
Change
Request
Ref.
5846
5931
5935
6022
rfo
5590
5934
5935
5846/
5847
6384
5943
5592
5771
5802
5642
803