at91sam9263 ATMEL Corporation, at91sam9263 Datasheet - Page 601

• Manufacturer Part Number: at91sam9263
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

35.6.2.7
6249D–ATARM–20-Dec-07
31
31
31
31
31
31
To Transmit a Word Stored in Big Endian Format on AC-link
To Transmit A Halfword Stored in Big Indian Format on AC-link
To Transmit a10-bit Sample Stored in Big Endian Format on AC-link
Byte0[7:0]
Endianness
–
–
–
–
–
The application can disable event interrupts by writing in AC’97 Controller Interrupt Disable Reg-
ister (AC97C_IDR). The AC‘97 Controller Interrupt Mask Register (AC97C_IMR) shows which
event can trigger an interrupt and which one cannot.
Endianness can be managed automatically for each channel, except for the Codec channel, by
writing to Channel Endianness Mode (CEM) in AC97C_CxMR. This enables transferring data on
AC-link in Big Endian format without any additional operation.
Word to be written in AC’97 Controller Channel x Transmit Holding Register (AC97C_CxTHR)
(as it is stored in memory or microprocessor register).
Word stored in Channel x Transmit Holding Register (AC97C_CxTHR) (data to transmit)
Data transmitted on appropriate slot: data[19:0] = {Byte2[3:0], Byte1[7:0], Byte0[7:0]}.
Halfword to be written in AC’97 Controller Channel x Transmit Holding Register
(AC97C_CxTHR).
Halfword stored in AC’97 Controller Channel x Transmit Holding Register (AC97C_CxTHR)
(data to transmit).
Data emitted on related slot: data[19:0] = {0x0, Byte1[7:0], Byte0[7:0]}.
Halfword to be written in AC’97 Controller Channel x Transmit Holding Register
(AC97C_CxTHR).
Halfword stored in AC’97 Controller Channel x Transmit Holding Register (AC97C_CxTHR)
(data to transmit).
Data emitted on related slot: data[19:0] = {0x000, Byte1[1:0], Byte0[7:0]}.
24
24
24
24
24
24
23
23
23
23
23
23
–
Byte1[7:0]
20
–
–
–
–
19
Byte2[3:0]
16
16
16
16
16
16
15
15
15
15
15
15
AT91SAM9263 Preliminary
–
Byte1[7:0]
Byte1[7:0]
Byte2[7:0]
Byte0[7:0]
Byte0[7:0]
10
Byte1
9
[1:0]
8
8
8
8
8
8
7
7
7
7
7
7
{0x00, Byte1[1:0]}
Byte3[7:0]
Byte0[7:0]
Byte1[7:0]
Byte0[7:0]
Byte0[7:0]
.
601
0
0
0
0
0
0