OMAP-L137 Low-Power Applications Processor
SPRS563A–SEPTEMBER 2008–REVISED OCTOBER 2008
www.ti.com
6.15 Multichannel Audio Serial Ports (McASP0, McASP1, and McASP2)
The McASP serial port is specifically designed for multichannel audio applications. Its key features are:
•
•
•
Flexible clock and frame sync generation logic and on-chip dividers
Up to sixteen transmit or receive data pins and serializers
Large number of serial data format options, including:
–
–
–
–
–
TDM Frames with 2 to 32 time slots per frame (periodic) or 1 slot per frame (burst)
Time slots of 8,12,16, 20, 24, 28, and 32 bits
First bit delay 0, 1, or 2 clocks
MSB or LSB first bit order
Left- or right-aligned data words within time slots
•
•
•
DIT Mode (optional) with 384-bit Channel Status and 384-bit User Data registers
Extensive error checking and mute generation logic
All unused pins GPIO-capable
Additionally, while the OMAP-L13x McASP modules are backward compatible with the McASP on
previous devices; the OMAP-L13x McASP includes the following new features:
•
Transmit & Receive FIFO Buffers for each McASP. Allows the McASP to operate at a higher sample
rate by making it more tolerant to DMA latency.
•
Dynamic Adjustment of Clock Dividers
–
–
Clock Divider Value may be changed without resetting the McASP
A one-shot adjustment (+/-1 Input Clock) feature has been added to enable simple input/output
sample rate matching
The three McASPs on the OMAP-L137 are configured with the following options:
Table 6-38. OMAP-L137 McASP Configurations(1)
Module
Serializers
AFIFO
DIT
OMAP-L137 Pins
64 Word RX
64 Word TX
AXR0[15:0], AHCLKR0, ACLKR0, AFSR0, AHCLKX0, ACLKX0,
AFSX0, AMUTE0
McASP0
16
N
64 Word RX
64 Word TX
AXR1[11:10], AXR1[8:0], AHCLKR1, ACLKR1, AFSR1, AHCLKX1,
ACLKX1, AFSX1, AMUTE1
McASP1
McASP2
12
4
N
Y
16 Word RX
16 Word TX
AXR2[3:0], AHCLKR2, ACLKR2, AFSR2, AHCLKX2, ACLKX2,
AFSX2, AMUTE2
(1) Pins available are the maximum number of pins that may be configured for a particular McASP; not including pin multiplexing.
130
Peripheral Information and Electrical Specifications
Submit Documentation Feedback
TI [ TEXAS INSTRUMENTS ]
