TMS320C6455
SPRS276M –MAY 2005–REVISED MARCH 2012
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7.12 Host-Port Interface (HPI) Peripheral
7.12.1 HPI Device-Specific Information
The C6455 device includes a user-configurable 16-bit or 32-bit Host-port interface (HPI16/HPI32). The
AEA14 pin controls the HPI_WIDTH, allowing the user to configure the HPI as a 16-bit or 32-bit peripheral.
Software handshaking via the HRDY bit of the Host Port Control Register (HPIC) is not supported on the
C6455 device.
An HPI boot is terminated using a DSP interrupt. The DSP interrupt is registered in bit 0 (channel 0) of the
EDMA Event Register (ER). This event must be cleared by software before triggering transfers on DMA
channel 0.
7.12.2 HPI Peripheral Register Descriptions
Table 7-54. HPI Control Registers
HEX ADDRESS RANGE ACRONYM REGISTER NAME COMMENTS
0288 0000 - Reserved
The CPU has read/write
access to the
0288 0004 PWREMU_MGMT HPI power and emulation management register PWREMU_MGMT register;
the Host does not have any
access to this register.
0288 0008 - 0288 0024 - Reserved
0288 0028 - Reserved
0288 002C - Reserved
The Host and the CPU have
0288 0030 HPIC HPI control register read/write access to the
HPIC register.
(1)
HPIA HPI address register
The Host has read/write
0288 0034
(HPIAW)
(2)
(Write)
access to the HPIA registers.
The CPU has only read
HPIA HPI address register
0288 0038
access to the HPIA registers.
(HPIAR)
(2)
(Read)
0288 000C - 028B 007F - Reserved
0288 0080 - 028B FFFF - Reserved
(1) The CPU can write 1 to the HINT bit to generate an interrupt to the host and it can write 1 to the DSPINT bit to clear/acknowledge an
interrupt from the host.
(2) There are two 32-bit HPIA registers: HPIAR for read operations and HPIAW for write operations. The HPI can be configured such that
HPIAR and HPIAW act as a single 32-bit HPIA (single-HPIA mode) or as two separate 32-bit HPIAs (dual-HPIA mode) from the
perspective of the host. The CPU can access HPIAW and HPIAR independently. For details about the HPIA registers and their modes,
see the TMS320C645x DSP Host Port Interface (HPI) User's Guide (literature number SPRU969) .
174 C64x+ Peripheral Information and Electrical Specifications Copyright © 2005–2012, Texas Instruments Incorporated
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