STR720RBQ6 datasheet(124/401 Pages) STMICROELECTRONICS

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STR720 - EXTERNAL MEMORY INTERFACE (EMI)

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Bank 1 Base Address Register (BBASE1)

Address Offset: 10h

Reset value: 0000h

Note

According to I/O configuration, memory bank 1 could not be accessible. In that case

this register must be considered reserved and it must be always written to 0000h.

The Bank 1 Base Address Register (BBASE1) is a 16 bit read/write register. It defines the

location of the Bank 1 memory region accordingly to the expression: Start Address =

0b_BBASE1[11:0] | 000_0000_0000, where bits 22 down to 11 of the address are determined

by the content of the BBASE1 register and remaining bits 10 down to 0 are set to zero. This

allows the configuration of the bank start address with a granularity of 211 (2k) bytes in the

total EMI addressable space of 223 (8M) bytes.

Bit 15:12 Reserved. These bits must be always written to ‘0’.

Bit 11:0

BBASE1[11:0]. Bank 1 Start Address Register.

The 12 bits of the register are the 12 MSB bits of the region start address.

11.4.1

In the Table 34 an overview of the EMI registers is reported.

Refer to Table 21 on page 50 for the base address.

765432

Reserved

B_BASE1[11:0]

-rw

Table 34. EMI Register Map

Addr.

Offset

Name

BCON0

Res.

B_LENGTH[6:0]

EREN

ISYN0

C_LENGTH[2:0]

Res.

Res1

BCON1

Res.

B_LENGTH[6:0]

EREN

ISYN1

C_LENGTH[2:0]

Res.

Res1

Reserved (always write 0001h)

BBASE1

Reserved

B_BASE1[11:0]

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