Texas Instruments OMAP5912 Reference Manual page 347

System Operating Details
9.2 DSP Public Peripherals
9.3 DSP/MPU Shared Peripherals
9.4 Boot Mode for DSP Subsystem
84 DSP Subsystem
These modules are clocked by dedicated signals controlled by the CLKM2
DSP_CKCTL register.
The access rate to these peripherals is fixed by the TIPB bridge module and
does not have to be user-configured.
The public TIPB connects the DSP public peripherals to the DSP CPU to
provide a flexible communications scheme where the DSP or MPU domains
can access these devices. Because the peripheral registers are also mapped
in the MPU memory space, the MPU domain can access these peripherals
indirectly via the MPUI and public TIPB bridge. This results in a
pseudodynamic sharing scheme. The DSP public peripherals consist of the
following modules:
-
Two McBSPs: McBSP1 and McBSP3
-
Two MCSIs: MCSI1 and MCSI2
These peripherals are clocked by the DSPXOR_CK signal, which is a buffered
version of the OMAP5912 CLKIN signal.
The access rate to these peripherals is configured by strobe 2 control bits in
the DSP TIPB CMR register. See Section 4.1, Control Mode Register.
The DSP/MPU shared peripherals are designed with two TIPB connections,
one for the DSP public TIPB and another for the MPU public TIPB. This dual
connection provides a flexible communications scheme where either the DSP
domain or the MPU domain can access a peripheral without monopolizing the
alternate processor public peripheral bus. The DSP/MPU shared peripherals
consist of the following modules:
-
Mailbox registers for interprocessor communication
-
General-purpose I/O (GPIO)
-
Three UARTs: UART1, UART2, UART3
These peripherals can be clocked by signals from the DSP subsystem CLKM2
module or the MPU subsystem CLKM1 module.
The access rate to these peripherals via the DSP is configured by the strobe2
control bits in the TIPB CMR register. See Section 4.1, Control Mode Register.
The OMAP5912 device contains a bootloader that is a ROM-based utility
residing in the DSP subsystem ROM. It consists of a program (code) that
SPRU750A