AT91SAM7X128-CU Atmel, AT91SAM7X128-CU Datasheet - Page 665

• Manufacturer Part Number: AT91SAM7X128-CU
• Description: MCU ARM 128K HS FLASH 100-TFBGA
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91SAM7X128-CU

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 55MHz
• Connectivity: CAN, Ethernet, I²C, SPI, SSC, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, DMA, POR, PWM, WDT
• Number Of I /o: 62
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 1.95 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-TFBGA
• For Use With: AT91SAM-ICE - EMULATOR FOR AT91 ARM7/ARM9AT91SAM7X-EK - KIT EVAL FOR AT91SAM7X256/128
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

41.4.8.2
41.4.8.3
41.4.9
41.4.9.1
41.4.9.2
6120H–ATARM–17-Feb-09
Two-wire Interface (TWI)
SSC: Transmitter Limitations in Slave Mode
SSC: Transmitter Limitations in Slave Mode
TWI: Clock Divider
TWI: Disabling Does not Operate Correctly
If TK is programmed as output and TF is programmed as input, it is impossible to emit data
when the start of edge (rising or falling) of synchro has a Start Delay equal to zero.
None.
If TK is programmed as an input and TF is programmed as an output and requested to be set to
low/high during data emission, the Frame Synchro signal is generated one bit clock period after
the data start and one data bit is lost. This problem does not exist when generating a periodic
synchro.
The data need to be delayed for one bit clock period with an external assembly. In the following
schematic, TD, TK and NRST are AT91SAM7X signals, TXD is the delayed data to connect to
the device.
The value of CLDIV x 2
must be less than or equal to 8191⋅
None.
Any transfer in progress is immediately frozen if the Control Register (TWI_CR) is written with
the bit MSDIS at 1. Furthermore, the status bits TXCOMP and TXRDY in the Status Register
(TWI_SR) are not reset.
Problem Fix/Workaround
Problem Fix/Workaround
Problem Fix/Workaround
Problem Fix/Workaround
CKDIV
AT91SAM7X512/256/128 Preliminary
must be less than or equal to 8191, the value of CHDIV x 2
CKDIV
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