AT91SAM7X256B-CU Atmel, AT91SAM7X256B-CU Datasheet - Page 284
AT91SAM7X256B-CU
Manufacturer Part Number
AT91SAM7X256B-CU
Description
IC MCU 256KB FLASH 100TFBGA
Manufacturer
Atmel
Series
AT91SAMr
Specifications of AT91SAM7X256B-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
256KB (256K x 8)
Program Memory Type
FLASH
Ram Size
64K 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
Processor Series
91S
Core
ARM7TDMI
Data Bus Width
32 bit
Data Ram Size
64 KB
Interface Type
CAN, Ethernet, SPI, I2S, TWI, USART, USB
Maximum Clock Frequency
55 MHz
Number Of Programmable I/os
62
Number Of Timers
3
Operating Supply Voltage
3.3 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Operating Temperature Range
- 40 C to + 85 C
Package
100TFBGA
Device Core
ARM7TDMI
Family Name
91S
Maximum Speed
55 MHz
On-chip Adc
8-chx10-bit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Details
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Figure 29-6. Master Write with Multiple Data Byte
Figure 29-7. Master Write with One Byte Internal Address and Multiple Data Bytes
284
TXCOMP
TXCOMP
TXRDY
TXRDY
TWD
TWD
AT91SAM7X512/256/128 Preliminary
Write THR (Data n)
S
Write THR (Data n)
S
DADR
DADR
acknowledge the byte. As with the other status bits, an interrupt can be generated if enabled in
the interrupt enable register (TWI_IER). If the slave acknowledges the byte, the data written in
the TWI_THR, is then shifted in the internal shifter and transferred. When an acknowledge is
detected, the TXRDY bit is set until a new write in the TWI_THR. When no more data is written
into the TWI_THR, the master generates a stop condition to end the transfer. The end of the
complete transfer is marked by the TWI_TXCOMP bit set to one. See
and
Figure 29-5. Master Write with One Data Byte
W
Figure
W
TXCOMP
A
TXRDY
TWD
29-7.
IADR(7:0)
A
Write THR (DATA)
S
Write THR (Data n+1)
DATA n
A
DADR
DATA n
Write THR (Data n+1)
A
W
A
A
Write THR (Data n+x)
DATA n+5
Last data sent
DATA
Write THR (Data n+x)
DATA n+5
Last data sent
A
(ACK received and TXRDY = 1)
A
DATA n+x
A
STOP sent automaticaly
(ACK received and TXRDY = 1)
(ACK received and TXRDY = 1)
P
STOP sent automaticaly
Figure
DATA n+x
STOP sent automaticaly
6120H–ATARM–17-Feb-09
29-5,
A
A
Figure
P
P
29-6,
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