AHCLKR_IN
AHCLKR_OUT
0
1
1
0
1
0
1
0
1
0
Divider
/1.../4096
HCLKRDIV
(AHCLKRCTL[11-0])
Divider
/1.../32
CLKRDIV
(ACLKRCTL[4-0])
HCLKRP
(Polarity)
(AHCLKRCTL.14)
AUXCLK
HCLKRM
(internal/external)
(AHCLKRCTL.15)
RCLK
ASYNC
(ACLKXCTL.6)
XCLK
(from Figure 16)
CLKRP
(polarity)
(ACLKRCTL.7)
CLKRm
(internal/external)
(ACLKRCTL.5)
Pin Muxing
ACLKR
pin
Functional Description
22.3.5.2 Receive Clock
The receiver also has the option to operate synchronously from the ACLKX and AFSX signals. This is
achieved when the ASYNC bit in the transmit clock control register (ACLKXCTL) is cleared to 0 (see
). The receiver may be configured with different polarity (CLKRP) and frame sync data delay
options from those options of the transmitter.
The receive clock configuration is controlled by the following registers:
•
ACLKRCTL.
•
AHCLKRCTL.
Figure 22-18. Receive Clock Generator Block Diagram
3785
SPRUH73H – October 2011 – Revised April 2013
Multichannel Audio Serial Port (McASP)
Copyright © 2011–2013, Texas Instruments Incorporated