at91rm3400 ATMEL Corporation, at91rm3400 Datasheet - Page 334

• Manufacturer Part Number: at91rm3400
• Description: Atmel Advanced At91 Arm Microcontroller
• Manufacturer: ATMEL Corporation

SSC Transmit Frame Mode Register
Name:
Access Type:
• DATLEN: Data Length
0x0 is not supported. The value of DATLEN can be set between 0x1 and 0x1F.
The bit stream contains DATLEN + 1 data bits. Moreover, it defines the transfer size performed by the PDC assigned to the
Receiver.
If DATLEN is less than or equal to 7, data transfers are in bytes. If DATLEN is between 8 and 15 (included), half-words are
transferred. For any other value, 32-bit words are transferred.
• DATDEF: Data Default Value
This bit defines the level driven on the TD pin while out of transmission. Note that if the pin is defined as multi-drive by the
PIO Controller, the pin is enabled only if the SCC TD output is 1.
• MSBF: Most Significant Bit First
0: The lowest significant bit of the data register is shifted out first in the bit stream.
1: The most significant bit of the data register is shifted out first in the bit stream.
• DATNB: Data Number per frame
This field defines the number of data words to be transferred after each transfer start. If 0, only 1 data word is transferred
and up to 16 data words can be transferred.
• FSLEN: Transmit Frame Sync Length
This field defines the length of the Transmit Frame Sync signal and the number of bits shifted out from the Transmit Sync
Data Register if FSDEN is 1. If 0, the Transmit Frame Sync signal is generated during one Transmit Clock period and up to
16 clock period pulse length is possible.
• FSOS: Transmit Frame Sync Output Selection
• FSDEN: Frame Sync Data Enable
0: The TD line is driven with the default value during the Transmit Frame Sync signal.
1: SSC_TSHR value is shifted out during the transmission of the Transmit Frame Sync signal.
334
FSDEN
MSBF
0x6-0x7
31
23
15
FSOS
–
–
7
0x0
0x1
0x2
0x3
0x4
0x5
AT91RM3400
SSC_TFMR
Read/Write
Selected Transmit Frame Sync Signal
None
Negative Pulse
Positive Pulse
Driven Low during data transfer
Driven High during data transfer
Toggling at each start of data transfer
Reserved
30
22
14
–
–
6
–
DATDEF
FSOS
29
21
13
–
–
5
28
20
12
–
–
4
27
19
11
–
3
DATLEN
26
18
10
–
2
FSLEN
DATNB
25
17
–
9
1
Undefined
Input-only
TF pin
Output
Output
Output
Output
Output
1790A–ATARM–11/03
FSEDGE
24
16
8
0