AT91SAM7X128 Atmel, AT91SAM7X128 Datasheet - Page 148

• Manufacturer Part Number: AT91SAM7X128
• Description: MCU 32-Bit 91S ARM7TDMI RISC 128KB Flash 1.8V/3.3V 100-Pin LQFP
• Manufacturer: Atmel

Specifications of AT91SAM7X128

• Package: 100LQFP
• Device Core: ARM7TDMI
• Family Name: 91S
• Maximum Speed: 55 MHz
• Ram Size: 32 KB
• Program Memory Size: 128 KB
• Operating Supply Voltage: 1.8|3.3 V
• Data Bus Width: 32 Bit
• Program Memory Type: Flash
• Number Of Programmable I/os: 62
• Interface Type: CAN/Ethernet/SPI/I2S/TWI/USART/USB
• On-chip Adc: 8-chx10-bit
• Operating Temperature: -40 to 85 °C
• Number Of Timers: 3

22.4.7
Register Name:
Access Type:
• TXNPTR: Transmit Next Pointer Address
TXNPTR is the address of the next buffer to transmit when the current buffer is empty.
22.4.8
Register Name:
Access Type:
• TXNCR: Transmit Next Counter Value
TXNCR is the size of the next buffer to transmit.
148
31
23
15
31
23
15
7
7
AT91SAM7X512/256/128 Preliminary
PDC Transmit Next Pointer Register
PDC Transmit Next Counter Register
PERIPH_TNPR
Read-write
30
22
14
PERIPH_TNCR
Read-write
30
22
14
6
6
29
21
13
29
21
13
5
5
28
20
12
28
20
12
4
4
TXNPTR
TXNPTR
TXNPTR
TXNPTR
TXNCR
TXNCR
--
--
27
19
11
27
19
11
3
3
26
18
10
26
18
10
2
2
25
17
25
17
9
1
9
1
6120H–ATARM–17-Feb-09
24
16
24
16
8
0
8
0