HEATEVM datasheet(28/79 Pages) TI1

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SM470R1B1M-HT

SPNS155H – SEPTEMBER 2009 – REVISED SEPTEMBER 2013

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memory selects

Memory selects allow the user to address memory arrays (i.e., flash, RAM, and HET RAM) at user-defined

addresses. Each memory select has its own set (low and high) of memory base address registers (MFBAHRx

and MFBALRx) that, together, define the array's starting (base) address, block size, and protection.

The base address of each memory select is configurable to any memory address boundary that is a multiple of

the decoded block size. For more information on how to control and configure these memory select registers, see

the bus structure and memory sections of the TMS470R1x System Module Reference Guide (literature number

SPNU189).

For the memory selection assignments and the memory selected, see Table 6.

Table 6. SM470R1B1M Memory Selection Assignment

MEMORY

MEMORY BASE ADDRESS

STATIC MEM

SELECTED

MPU

MSM

SELECT

SIZE(1)

CTL REGISTER

(ALL INTERNAL)

0 (fine)

FLASH/ROM

YES

MFBAHR0 and MFBALR0

1 M

1 (fine)

FLASH/ROM

YES

MFBAHR1 and MFBALR1

2 (fine)

RAM

YES

MFBAHR2 and MFBALR2

64 K(2)

3 (fine)

RAM

YES

MFBAHR3 and MFBALR3

4 (fine)

HET RAM

1 K

MFBAHR4 and MFBALR4

SMCR1

512K x 8 (512KB)

5 (coarse)

CS[5]/GIOC[3]

256K x 16

MCBAHR2 and MCBALR2

SMCR5

(512KB)

512K x 8 (512KB)

6 (coarse)

CS[6]/GIOC[4]

256K x 16

MCBAHR3 and MCBALR3

SMCR6

(512KB)

(1)

x8 refers to size of memory in 8-bits; x16 refers to size of memory in 16-bits.

(2)

The starting addresses for both RAM memory-select signals cannot be offset from each other by a multiple of the user-defined block

size in the memory-base address register.

JTAG security module

The B1M device includes a JTAG security module to provide maximum security to the memory contents. The

visible unlock code can be in the OTP sector or in the first bank of the user-programmable memory. For the

B1M, the visible unlock code is in the OTP sector at address 0x0000_01F8.

memory security module

The B1M device also includes a memory security module (MSM) to provide additional security and flexibility to

the memory contents' protection. The password for unlocking the MSM is located in the four words just before

the flash protection keys.

RAM

The B1M device contains 64K-bytes of internal static RAM configurable by the SYS module to be addressed

within the range of 0x0000_0000 to 0xFFE0_0000. This B1M RAM is implemented in one 64K-byte array

selected by two memory-select signals. This B1M configuration imposes an additional constraint on the memory

map for RAM; the starting addresses for both RAM memory selects cannot be offset from each other by the

multiples of the size of the physical RAM (i.e., 64K bytes for the B1M device). The B1M RAM is addressed

through memory selects 2 and 3.

The RAM can be protected by the memory protection unit (MPU) portion of the SYS module, allowing the user

finer blocks of memory protection than is allowed by the memory selects. The MPU is ideal for protecting an

operating system while allowing access to the current task. For more detailed information on the MPU portion of

the SYS module and memory protection, see the memory section of the TMS470R1x System Module Reference

Guide (literature number SPNU189).

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