AT91SAM7S256D-AU Atmel, AT91SAM7S256D-AU Datasheet - Page 336

• Manufacturer Part Number: AT91SAM7S256D-AU
• Description: ARM Microcontrollers - MCU 256K Flash SRAM 64K ARM based MCU
• Manufacturer: Atmel
• Series: SAM7S256r

Specifications of AT91SAM7S256D-AU

• Rohs: yes
• Core: ARM
• Processor Series: AT91SAM
• Data Bus Width: 16 bit/32 bit
• Maximum Clock Frequency: 55 MHz
• Program Memory Size: 256 KB
• Data Ram Size: 64 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 3 V to 3.6 V
• Operating Temperature Range: - 40 C to + 85 C
• Package / Case: LQFP-64
• Mounting Style: SMD/SMT
• Interface Type: 2-Wire, I2S, SPI, USART
• Length: 7 mm

Figure 30-22. Multi-master Flowchart
START
Programm the SLAVE mode:
SADR + MSDIS + SVEN
Read Status Register
Yes
SVACC = 1 ?
GACC = 1 ?
SVREAD = 0 ?
EOSACC = 1 ?
TXRDY= 1 ?
Yes
Yes
Yes
Write in TWI_THR
TXCOMP = 1 ?
RXRDY= 0 ?
Yes
Yes
Read TWI_RHR
a master access ?
GENERAL CALL TREATMENT
Yes
Decoding of the
programming sequence
Prog seq
OK ?
Change SADR
Program the Master mode
DADR + SVDIS + MSEN + CLK + R / W
Read Status Register
Yes
ARBLST = 1 ?
Yes
MREAD = 1 ?
Yes
Yes
RXRDY= 0 ?
TXRDY= 0 ?
Yes
Yes
Data to read?
Data to send ?
Write in TWI_THR
Read TWI_RHR
Stop transfer
Read Status Register
Yes
TXCOMP = 0 ?
SAM7S Series [DATASHEET]
336
6175M–ATARM–26-Oct-12