AT91SAM7S256D-AU Atmel, AT91SAM7S256D-AU Datasheet - Page 155

• 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

22.4.3
Register Name:
Access Type:
• TXPTR: Transmit Pointer Address
Address of the transmit buffer.
22.4.4
Register Name:
Access Type:
• TXCTR: Transmit Counter Value
TXCTR is the size of the transmit transfer to be performed. At zero, the peripheral data transfer is stopped.
31
23
15
31
23
15
7
7
PDC Transmit Pointer Register
PDC Transmit Counter Register
30
22
14
30
22
14
PERIPH_TPR
Read-write
6
PERIPH_TCR
Read-write
6
29
21
13
29
21
13
5
5
28
20
12
28
20
12
4
4
TXCTR
TXCTR
TXPTR
TXPTR
TXPTR
TXPTR
--
--
27
19
11
27
19
11
3
3
26
18
10
26
18
10
2
2
SAM7S Series [DATASHEET]
6175M–ATARM–26-Oct-12
25
17
25
17
9
1
9
1
24
16
24
16
8
0
8
0
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