AT91M43300-25CI Atmel, AT91M43300-25CI Datasheet - Page 18

• Manufacturer Part Number: AT91M43300-25CI
• Description: IC ARM7 MCU 144 BGA
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91M43300-25CI

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 25MHz
• Connectivity: EBI/EMI, SPI, UART/USART
• Peripherals: WDT
• Number Of I /o: 58
• Program Memory Type: ROMless
• Ram Size: 3K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 144-LFBGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

Figure 18-4. Description of the Number of Standard Wait States
18.2
18.3
18.4
18
Initializing SPI in Master Mode May Cause Problems
SPI in Slave Mode Does not Work
Parity Error Bit (PARE) is Set Too Early
AT91M43300
MCKI
NWAIT
NCS
NWE
Access Length = One Wait State + Assertion of the NWAIT for One More Cycle
Initializing SPI in Master Mode May Cause a Mode Fault Detection
PA26/NPCS0/NSS pin must be pulled up to the V
PA26/NPCS0/NSS must be defined as a peripheral pin before programming the SPI peripheral.
In transmission, the data to be transmitted (written in SP_TDR) is transferred into the shift regis-
ter and, consequently, the TDRE bit in SP_SR is set to 1. Though the transfer has not begun,
when the following data is written in SP_TDR, it is also transferred into the shift register, crush-
ing the preceding data and setting the bit TDRE to 1.
No work around available.
The Parity Error bit on the USART is set as soon as the parity bit is detected. However, the faulty
character reception status (RXRDY) is set afterwards, only when the stop bit is detected. This is
particularly unfortunate when working in Multi-drop mode, as the PARE bit identifies the Address
Bytes. When it is detected, the corresponding character has not yet been transferred in the
US_RHR register and, therefore, is not yet available.
No problem fix/work around to propose.
Problem Fix/Workaround
Problem Fix/Workaround
Problem Fix/Workaround
EB16
DDIO
power supply.
Erroneous NWE Rising
1322B–ATARM–12-Dec-05