Register Map; External Peripheral Interface (Epi) Register Map M3 Base Address: 0X400D_0000, C28X Base Address: 0X7C00 - Texas Instruments Concerto F28M35 Series Technical Reference Manual

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17.10 Register Map

lists the EPI registers. The offset listed is a hexadecimal increment to the register's address,

relative to the base address of 0x400D.0000 (ending address of 0x400D.0FFF). Note that the EPI

controller clock must be enabled before the registers can be programmed. There must be a delay of three

system clocks after the EPI module clock is enabled before any EPI module registers are accessed.

NOTE: A back-to-back write followed by a read of the same register reads the value that written by

the first write access, not the value from the second write access. (This situation only occurs

when the processor core attempts this action, the µDMA does not do this.) To read back

what was just written, another instruction must be generated between the write and read.

Read-write does not have this issue, so use of read-write for clear of error interrupt cause is

not affected.

For all versions of EPI, only WORD read and write accesses to registers are supported.

SPRUH22I – April 2012 – Revised November 2019

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Table 17-11. External Peripheral Interface (EPI) Register Map

M3 Base Address: 0x400D_0000, C28x Base Address: 0x7C00

C28x Offset Address

EPIREADFIFO1

EPIREADFIFO2

EPI Configuration Register

EPI Main Baud Rate

EPI SDRAM Configuration

EPI Host-Bus 8

Configuration Register

EPI Host-Bus 16

Configuration Register

EPI General-Purpose

Configuration Register

EPI Host-Bus 8

Configuration 2 Register

EPI Host-Bus 16

Configuration 2 Register

EPI General-Purpose

Configuration 2 Register

EPI Address Map Register

EPI Read Size 0 Register

EPI Read Address 0

EPI Non-Blocking Read Data

EPI Read Size 1 Register

EPI Read Address 1

EPI Non-Blocking Read Data

EPI Status Register

EPI Read FIFO Count

EPI Read FIFO Register

EPI Read FIFO Alias 1

EPI Read FIFO Alias 2

External Peripheral Interface (EPI)

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Register Map; External Peripheral Interface (Epi) Register Map M3 Base Address: 0X400D_0000, C28X Base Address: 0X7C00 - Texas Instruments Concerto F28M35 Series Technical Reference Manual

17.10 Register Map

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