AT91RM9200-QI-002 Atmel, AT91RM9200-QI-002 Datasheet - Page 618

• Manufacturer Part Number: AT91RM9200-QI-002
• Description: IC ARM9 MCU 208 PQFP
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91RM9200-QI-002

• Core Processor: ARM9
• Core Size: 16/32-Bit
• Speed: 180MHz
• Connectivity: EBI/EMI, Ethernet, I²C, MMC, SPI, SSC, UART/USART, USB
• Peripherals: POR
• Number Of I /o: 122
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: ROM
• Ram Size: 48K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 1.95 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 208-MQFP, 208-PQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -

36.6.4
Name:
Access Type:
• ADDRESS: Transmit Address Register
Written with the address of the frame to be transmitted, read as the base address of the buffer being accessed by the trans-
mit FIFO. Note that if the two least significant bits are not zero, transmit starts at the byte indicated.
36.6.5
Name:
Access Type:
• LEN: Transmit Frame Length
This register is written to the number of bytes to be transmitted excluding the four CRC bytes unless the no CRC bit is
asserted. Writing these bits to any non-zero value initiates a transmission. If the value is greater than 1514 (1518 if no CRC
is being generated), an oversize frame is transmitted. This field is buffered so that a new frame can be queued while the
previous frame is still being transmitted. Must always be written in address-then-length order. Reads as the total number of
bytes to be transmitted (i.e., this value does not change as the frame is transmitted.) Frame transmission does not start
until two 32-bit words have been loaded into the transmit FIFO. The length must be great enough to ensure two words are
loaded.
• NCRC: No CRC
If this bit is set, it is assumed that the CRC is included in the length being written in the low-order bits and the MAC does not
append CRC to the transmitted frame. If the buffer is not at least 64 bytes long, a short frame is sent. This field is buffered
so that a new frame can be queued while the previous frame is still being transmitted. Reads as the value of the frame cur-
rently being transmitted.
618
NCRC
31
23
15
31
23
15
7
–
–
7
AT91RM9200
EMAC Transmit Address Register
EMAC Transmit Control Register
30
22
14
30
22
14
ETH_TAR
Read/Write
6
ETH_TCR
Read/Write
–
–
–
6
29
21
13
29
21
13
5
–
–
–
5
28
20
12
28
20
12
4
–
–
–
4
ADDRESS
ADDRESS
ADDRESS
ADDRESS
LEN
27
19
11
27
19
11
–
–
–
3
3
26
18
10
26
18
10
2
–
–
2
LEN
25
17
25
17
–
–
9
1
9
1
1768I–ATARM–09-Jul-09
24
16
24
16
8
0
–
–
8
0